Stress

A direct serotonin precursor derived from Griffonia simplicifolia seeds. Clinical studies show 5-HTP reduces anxiety and stress-related panic responses, and preliminary evidence supports improvement in mood. It increases serotonin synthesis, which influences stress reactivity, mood, and sleep.

7-Keto-DHEA has been studied in the context of stress-related disorders, particularly PTSD. A published case series of five treatment-resistant women with PTSD showed rapid, substantial symptom improvement at doses of 25–150 mg/day. A transdermal human study also documented a 7.4% reduction in cortisol levels, suggesting anti-glucocorticoid activity relevant to the stress response. Evidence is preliminary and limited to very small samples.

Antistress activity is listed among confirmed in vivo bioactivities of A. spectabilis in peer-reviewed pharmacological review literature. Cold swimming stress tests and related models have been used in preclinical evaluation. This is consistent with the plant's traditional use as a tonic.

Acetyl-L-Tyrosine (NALT), acting via conversion to L-tyrosine, is the best-evidenced nutraceutical for attenuating stress-induced cognitive decline. Multiple placebo-controlled trials show tyrosine prevents catecholamine depletion under cold, sleep deprivation, and military-training stress. Effects are most reliable when catecholamine demand is high rather than at rest. Typical research doses range from 100–150 mg/kg or 2–10 g/day.

One of the most extensively studied adaptogens for stress. Multiple double-blind, placebo-controlled RCTs demonstrate significant reductions in perceived stress scores and serum cortisol. Active withanolides modulate the HPA axis and GABAergic signaling. Used in Ayurvedic medicine for over 3,000 years as a rasayana (rejuvenating tonic).

A. racemosus is one of the most extensively documented Ayurvedic adaptogens, with preclinical evidence across multiple animal models for HPA axis modulation, cortisol reduction, and upregulation of brain monoaminergic and GABAergic systems. Standardized root extract is listed in both the Indian and British Pharmacopeias as an adaptogen. Limited clinical data corroborates anxiolytic and stress-attenuating effects.

A 2020 human RCT (PMC7093296) assessed astaxanthin-rich extract on stress and sleep in adults, with improvements in mood subscales linked to stress and fatigue. The 8-week US RCT also showed significant reductions in tension (−20%) and anger (−12%). Preclinical and human evidence together suggest a mild adaptogenic-like effect on psychological stress markers.

A double-blind, placebo-controlled clinical trial (Frontiers in Nutrition, 2024) evaluated B. coagulans LMG S-31876 specifically for immunomodulation and stress in adults, finding measurable effects on stress-related parameters. The BCP92 RCT (n=100, 12 weeks) also reported significant stress relief as one of several measured outcomes.

A classical Ayurvedic herb (Bacopa monnieri/brahmi) used traditionally as a brain tonic and anxiolytic. Clinical studies demonstrate anxiety reduction and stress-related cognitive improvement. Included in systematic reviews of adaptogens with RCT-level evidence for cortisol and stress outcomes.

A proprietary standardized extract of Bacopa monnieri (brahmi) concentrated in bacosides, the triterpenoid saponins responsible for anxiolytic and adaptogenic actions. As the standardized form of Bacopa in clinical research, it shares the same clinical evidence for stress and anxiety reduction as Bacopa extracts generally.

The triterpenoid saponins of Bacopa monnieri (bacosides A and B), responsible for the herb's adaptogenic and anxiolytic effects. Multiple clinical trials using bacoside-standardized extracts demonstrate anxiety reduction and stress-related cognitive improvements in healthy adults and older populations.

Holy basil (O. tenuiflorum) has the strongest human clinical evidence among all its indications for stress. A well-designed RCT (n=158, 6 weeks, 1200 mg/day OciBest) significantly improved stress-related symptoms vs. placebo. A Frontiers in Nutrition RCT (Holixer) also showed reduced perceived stress and improved stress biomarkers. Ocimumosides A and B modulate the HPA axis and reduce corticosterone.

The Benegut clinical literature explicitly identifies psychosocial stress as a trigger of altered gut physiology via ileum contractions, and Perilla frutescens is positioned as a modulator of this pathway. Improvement in psychosocial quality of life outcomes associated with stress-driven digestive difficulties was reported in the clinical trial program. Preclinical data show perilla flavonoids and rosmarinic acid modulate stress-related neurobiology.

B. breve M-16V demonstrated in a double-blind, placebo-controlled RCT that it can reduce heart rate under stress conditions and improve mood and sleep quality in high-anxiety individuals. Preclinical studies show it can attenuate stress-induced disruption of autonomic nervous system balance and alleviate hyperactive HPA-axis responses. The mechanism involves intestinal production of GABA-related metabolites and modulation of the gut-brain axis.

B. longum NCC3001 significantly reduced perceived stress in a double-blind RCT of 45 healthy adults. B. longum 1714 reduced cortisol output in response to acute stress and altered brain-wave patterns associated with stress arousal. A combined probiotic (B. longum R0175 + L. helveticus R0052) reduced urinary free cortisol in a separate RCT.

Biota seed extracts demonstrate stress-modifying effects in the CUMS (chronic unpredictable mild stress) preclinical model, used to study both anxiety and depression-like phenotypes. Both aqueous extract and fatty oil fractions attenuated CUMS-induced behavioral changes. Traditional TCM also uses biota seed for stress-related symptoms including restlessness, palpitations, and emotional agitation.

L-theanine in black tea increases alpha-wave brain activity associated with relaxed alertness and has been shown to reduce subjective stress responses and salivary cortisol in human RCTs. The combination of caffeine and L-theanine in tea attenuates the anxiety-promoting effects of caffeine alone. Evidence strength is moderate with some inconsistency across studies.

A PubMed-indexed rodent study demonstrated anti-stress (adaptogenic) activity for the methanolic bark extract of A. scholaris using an acute restraint stress model. Pretreatment at 100–500 mg/kg for 7 days normalized stress-induced elevations in plasma corticosterone, glucose, cholesterol, and triglycerides.

B. falcatum is used extensively in TCM for stress and stress-related disorders (Liver Qi stagnation). Preclinical studies demonstrate it attenuates HPA axis hyperactivation, reduces elevated corticosterone, and blocks stress-induced CRF increases in the hypothalamus. It is classified as an adaptogenic herb in integrative medicine contexts.

C. crista seed extracts have demonstrated adaptogenic activity in preclinical stress models. Seed coat and kernel extracts significantly increased swim endurance time, corrected hyperglycemia, normalized serum cortisol depletion, and improved hyperlipidemia associated with chronic stress in rodents.

The EMA's HMPC community herbal monograph formally recognizes California poppy as a traditional herbal medicine for the relief of mild symptoms of mental stress. Anxiolytic and nervous system calming effects demonstrated in the Hanus et al. (2004) RCT and preclinical pharmacology underpin this designation. The herb's enzyme-inhibiting effects on catecholamine synthesis (MAO inhibition, dopamine β-hydroxylase inhibition) provide a plausible mechanism for stress modulation.

BCP has demonstrated stress-modulating effects in human inhalation studies (heart rate reduction, facial expression changes) and in animal models of acute and chronic stress. Its CB2-mediated anti-neuroinflammatory effects are considered the primary mechanism.

Matricaria chamomilla has clinical evidence for anxiety and stress reduction. Its flavonoid apigenin binds GABA-A receptors. A long-term RCT demonstrated significant relapse prevention in generalized anxiety disorder, and Commission E recognizes its use for nervous conditions.

Clinical aromatherapy studies show C. sinensis EO reduces physiological and subjective stress markers. Preclinical evidence in chronic stress models indicates modulation of the olfactory-serotonergic axis. Traditional use in European herbal medicine cites orange preparations for nervous tension.

An 8-week RCT in middle-aged Japanese women found cacao flavanol supplementation improved autonomic nervous system balance and reduced total mood disturbance, including stress-related states, versus placebo. Flavanols activate CREB/BDNF pathways relevant to stress resilience. Evidence is preliminary.

A medicinal fungus used in Traditional Chinese Medicine as an adaptogen. Cordyceps modulates HPA axis and cortisol responses to physical stress. In an RCT in endurance cyclists, Cordyceps+reishi supplementation significantly buffered the cortisol stress response to intense exercise.

A published prospective study in 60 infertile men demonstrated that 5 g/day of M. pruriens seed powder for 3 months significantly reduced serum cortisol levels and state-anxiety scores. Sperm quality improvements correlated with stress reduction. This constitutes direct human clinical evidence for cortisol-mediated stress reduction.

Animal studies demonstrate significant anxiolytic effects for damiana and its constituent apigenin via GABA-A/benzodiazepine receptor modulation. The British Herbal Pharmacopoeia cites anxiety neurosis as a specific indication. Neurochemical studies confirm stress-relevant CNS activity. No human stress trials have been conducted.

DHEA is co-secreted with cortisol under acute stress and acts as a functional counter-regulator of glucocorticoid effects, particularly protecting the hippocampus. A meta-analysis of 14 stress studies (n=631) found DHEA levels increased significantly following acute stress. The cortisol-to-DHEA ratio is a recognized biomarker of HPA axis stress response functionality.

Cornus officinalis has preclinical evidence for stress-protective effects in animal models, reducing corticosterone, oxidative stress, and increasing serotonin and BDNF in stress-induced hippocampal damage. Jamaican dogwood has traditional use for nervous tension and stress, supported by animal anxiolytic data.

EGCG mitigates physiological and behavioral consequences of chronic stress in multiple rodent CUMS models, including reversing hypothalamic-pituitary-adrenal axis dysregulation markers, neuroinflammation, and depressive behavior. The stress-reducing effect is tied to its modulation of the NF-κB/caspase-1 pathway and NLRP3 inflammasome.

Siberian ginseng (Eleutherococcus senticosus), the first herb officially classified as an adaptogen in Soviet pharmacology. Clinical and preclinical evidence supports its ability to increase stress resistance and reduce stress-induced fatigue. Used in Traditional Chinese Medicine to tonify qi and support resilience.

Fisetin attenuated LPS- and restraint stress-induced neuroinflammatory responses and stress-associated behavioral changes in rodents by suppressing the HPA axis and hippocampal cytokine overexpression. Evidence is exclusively preclinical.

Preclinical studies in chronic unpredictable mild stress (UCMS) rat models demonstrate that P. cocos water extract and polysaccharides reduce stress-related behavioral deficits by downregulating neuroinflammation and normalizing monoamine levels. GABAergic modulation by pachymic acid provides a mechanistic basis for stress resilience.

The primary inhibitory neurotransmitter of the central nervous system, with a known role in stress regulation. Small clinical studies and emerging evidence via the gut-brain axis suggest oral GABA supplementation reduces stress and promotes relaxation. Widely consumed in Japan and East Asia for stress management.

Gamma oryzanol reduces stress-induced physiological responses in animal models, including stress-induced gastric ulcers and elevated corticosterone. A 1984 PubMed-indexed study found it has antiulcerative action against gastric lesions induced by conditioned emotional stimuli and REM sleep deprivation. A restraint-stress study showed reduced HPA-axis activation.

Ganoderma lucidum has documented adaptogenic properties in TCM and is associated with reduction of fatigue and improved well-being in a clinical neurasthenia RCT. The breast cancer pilot RCT also showed reduced anxiety and depression—stress correlates—alongside fatigue improvements.

Gardenia jasminoides volatiles demonstrably reduce physiological stress markers in human volunteers. The Zhi Zi Chi decoction modulates HPA axis stress responses in rodent models. Geniposide normalizes elevated corticosterone and ACTH in chronic stress-exposed rats. These effects are consistent with gardenia's long traditional classification as a calming herb.

A 2025 human study (Scientific Reports) found that Gardenia jasminoides floral volatiles reduced physiological stress markers in college students—specifically decreasing beta-wave power, skin electrical signal, and blood pressure, while increasing alpha-wave power and HRV. Preclinically, gardenia modulates the HPA axis stress response and reduces hippocampal neuroinflammation in stress models.

GE reduces corticosterone levels (a stress biomarker) in animal models and protects against chronic restraint stress-induced cognitive deficits via hippocampal AKT/CREB pathway modulation. Fresh GE has been specifically studied in chronic stress models.

Clinical trials demonstrate that geranium EO inhalation reduces perceived stress in healthcare workers and patients under physiological stress. The oil modulates HPA-axis activity and lowers cortisol-related stress markers. It is among the most studied aromatherapy agents for stress reduction.

Panax ginseng is a classical TCM adaptogen with clinical evidence for stress reduction via HPA axis modulation. Its ginsenosides demonstrate cortisol-lowering and neuroendocrine-regulating effects in RCTs. Used for millennia in East Asian medicine to combat fatigue and restore balance.

The primary bioactive saponins of Panax ginseng responsible for its adaptogenic and anti-stress actions. Ginsenosides modulate cortisol, HPA axis function, and neurochemical pathways. Preclinical and clinical studies confirm stress-protective effects at physiologically relevant doses.

A meta-analysis of four RCTs using standardized goji juice reported significant reductions in feelings of stress and fatigue. The 2008 human goji juice study found improved feelings of calmness and well-being within 15 days. Preclinical evidence shows LBP reduces markers of oxidative stress systemically. Human evidence is promising but based on subjective self-reported measures.

A double-blind, placebo-controlled human study found that Gotu Kola reduced the acoustic startle response—a validated measure of stress reactivity—in healthy volunteers. Small clinical studies also report self-reported decreases in stress when taken in place of antidepressant medication. Mechanistically, it modulates cortisol and GABAergic/serotonergic pathways.

A double-blind, placebo-controlled RCT (PMC7922661) found that GSEe (300 mg/day, 16 weeks) significantly modulated perceived stress in healthy volunteers alongside blood pressure benefits. In vitro mechanistic research shows GSE inhibits MAO-A and GABA-T, pathways directly relevant to stress response modulation.

RCT and cohort evidence supports green tea's stress-reducing effects via L-theanine's modulation of cortisol, sympathetic tone, and serotonin metabolism. A 2025 systematic review of 13 RCTs found 5 studies reporting improvements in stress symptoms. In healthy volunteers, 200 mg L-theanine significantly reduced salivary cortisol and sympathetic arousal under cognitive stress. Long-term green tea consumption in a cohort of middle-aged and older men was associated with reduced depression and improved inflammatory markers linked to stress.

Ho wood, rich in linalool, is used traditionally and in modern aromatherapy for stress relief. Preclinical studies show linalool modulates GABAergic pathways reducing stress responses. Traditional aromatherapy sources identify ho wood diffusion as a recognized practice for stress and mental overload.

A bioactive neolignan from Magnolia officinalis bark with documented anxiolytic properties. Honokiol modulates GABA-A receptors (an allosteric positive modulator) in preclinical models, and as a component of Relora/magnolia extracts, contributes to the clinical stress and anxiety data for those products.

A randomized, double-blind, placebo-controlled crossover pilot study found that a hops dry extract significantly reduced self-reported stress scores (DASS-21) in young adults over 4 weeks. Morning cortisol levels were also measured as an objective marker. Hops's interaction with serotonin and melatonin receptor subtypes is proposed as a contributing mechanism.

T. cordifolia is classified as an adaptogen (Rasayana) in Ayurveda, and a human clinical trial tested it under physical stress conditions. A PMC-indexed study (PMC4895752) in healthy adult volunteers found that T. cordifolia administration significantly decreased systolic and diastolic blood pressure and heart rate in response to exercise-induced physical stress versus placebo, indicating suppression of sympathetic overactivation.

Jujube seeds possess documented anxiolytic properties in animal models, with the mechanism involving GABA-A receptor modulation and serotonergic activity. Traditional use in East Asian medicine for anxiety and neurasthenia spans millennia. Limited human clinical data exist, though experiments in humans and animals support anxiolytic and sedative properties.

Kanna has both a well-documented traditional role in stress management and preliminary human clinical evidence supporting this use. It was historically used by San and Khoikhoi peoples to endure physically and psychologically demanding conditions. A 2014 RCT in young adults found Zembrin (25 mg/day for 8 days) improved cognitive performance under stress, and a Stellenbosch University animal study found Sceletium modulated HPA-axis immune markers during stress.

A South Pacific ceremonial and medicinal plant (Piper methysticum) with substantial clinical evidence for anxiety and stress reduction. A Cochrane systematic review of 11 RCTs (n=645) found kava significantly superior to placebo for anxiety. Kavalactones modulate GABA-A receptors to produce anxiolytic effects.

The primary bioactive compounds in Kava (Piper methysticum), responsible for its anxiolytic and stress-reducing effects. Clinical reviews confirm kavalactones modulate GABA-A receptors and demonstrate mild-to-moderate efficacy for stress and anxiety reduction in multiple RCTs and meta-analyses.

Multiple human RCTs demonstrate that L-ornithine reduces biochemical and subjective stress markers. An 8-week RCT in 52 workers showed L-ornithine significantly lowered serum cortisol, the cortisol/DHEA-S ratio, and anger on the POMS scale. A 2024 parallel-group RCT using the Trier Social Stress Test (TSST) in 65 participants found L-ornithine (1,600 mg/day for 7 days) significantly improved fatigue-inertia and anger-hostility POMS subscales the morning after social stress. The mechanism likely involves modulation of the hypothalamic-pituitary-adrenal (HPA) axis.

A non-protein amino acid from green tea with well-documented acute and subacute anti-stress effects. RCTs show 200–400 mg/day reduces subjective stress ratings, anxiety scores, and salivary cortisol. Promotes alpha-wave brain activity and increases GABA, supporting a state of calm alertness without sedation.

The dietary precursor to serotonin and melatonin, with a well-established role in stress and mood regulation. L-Tryptophan supplementation is listed in authoritative stress management protocols as a natural intervention. Deficiency-induced serotonin reductions increase stress vulnerability, and supplementation has been studied for mood and stress.

L. casei Shirota has been tested in an RCT model of examination stress in healthy medical students and shown to reduce cold/flu symptoms and abdominal symptoms triggered by stress. Broader psychobiotic research implicates L. casei in the gut-brain axis modulation of the HPA axis and cortisol responses. L. casei and its supplement have been shown to alleviate stress-induced depression and anxiety in mouse CUMS models via BDNF-TrkB pathways.

L. gasseri CP2305 has repeatedly demonstrated stress-modulating effects in human RCTs, including suppression of salivary cortisol and improvements in stress-associated psychological symptoms. The strain L. paragasseri OLL2809 (formerly classified as L. gasseri) has modulated anxiety and stress markers in young athletes in a clinical study.

L. paracasei Lpc-37 and PS23 have been evaluated for perceived stress reduction in clinical trials. Lpc-37 has shown reductions in perceived stress in healthy adults in prior studies, and the ChillEx RCT specifically modeled chronic examination stress in university students. PS23 improved salivary stress biomarkers and antioxidant levels alongside anxiety and sleep measures.

An RCT demonstrated that L. plantarum 299v significantly reduced salivary cortisol in students under examination stress compared to placebo. Additional RCTs with P8 and JYLP-326 strains confirm stress reduction via gut-brain axis modulation.

L. rhamnosus HN001 demonstrated improvements in stress, happiness, and anxiety measures in a double-blind RCT of 120 stressed adults (PSS-defined), though changes did not reach statistical significance. A 2025 systematic review of animal studies confirmed consistent stress-reducing effects of L. rhamnosus JB-1 via HPA axis modulation. GABA synthesis and cortisol regulation are the primary proposed mechanisms.

Lavandula angustifolia has strong clinical evidence for stress and anxiety reduction. An oral lavender oil preparation (Silexan, 80 mg/day) is approved in Europe for anxiety. Multiple RCTs demonstrate significant effects on generalized anxiety, with linalool acting on serotonin and voltage-gated calcium channels.

Melissa officinalis is a traditional European herb with clinical evidence for stress and anxiety reduction. Its rosmarinic acid inhibits GABA transaminase and promotes GABAergic activity. RCTs report reductions in anxiety, stress, and mood disturbance, with Commission E recognition for nervous restlessness.

Human studies demonstrate that lemongrass aroma reduces stress markers including subjective tension and hemodynamic stress responses. Animal research confirms that C. citratus extract attenuates neurobehavioral and biochemical changes induced by psychosocial stress. Traditional use in folk medicine for nervous disorders is well documented.

Licorice root inhibits 11β-HSD2, the enzyme that inactivates cortisol, thereby prolonging cortisol availability and supporting adrenal function under stress. This mechanism has been documented in the journal Molecular and Cellular Endocrinology. Some clinical evidence shows licorice supports cortisol availability in adrenal insufficiency. Licorice is categorized as an adaptogenic herb in herbal medicine.

Limonene demonstrates anti-stress effects in both animal and human studies. Preclinical models show D-limonene inhibits HPA axis hyperactivation under restraint stress, reduces corticosterone, and attenuates stress-induced behavioral changes. Human clinical observation with ambient citrus fragrance (limonene-dominant) showed reductions in urinary cortisol and normalization of immune biomarkers in stressed/depressed patients.

A double-blind, parallel-group RCT of 41 young adults found that 28 days of Lion's Mane supplementation (1.8 g/day) produced subjective reductions in stress versus placebo. Animal models show restoration of stress-depleted neurotransmitters and reduction of cortisol-related signaling.

Lithium modulates the hypothalamic-pituitary-adrenal (HPA) axis, reduces cortisol, and attenuates stress-induced neuronal damage through BDNF upregulation and GSK-3β inhibition. Even at low doses, lithium fosters a neuroadaptive environment that enhances resilience against stress-induced injury, supported by pharmacological research.

Luteolin attenuates physiological and behavioral stress responses in animal models by normalizing HPA axis dysregulation, reducing corticosterone and ACTH levels, and suppressing neuroinflammation in hippocampal stress-processing circuits.

An essential mineral with a well-established role in stress physiology. Stress depletes magnesium, while low magnesium amplifies the stress response. A systematic review of 18 studies found beneficial effects on subjective anxiety in vulnerable populations. Magnesium regulates NMDA receptors and supports GABA activity.

Magnolia officinalis bark extracts (honokiol and magnolol) have traditional and clinical evidence for stress and anxiety reduction. As the primary botanical in Relora, a placebo-controlled RCT found significant acute anxiety reduction. Magnolia bark modulates GABA-A receptors and HPA axis activity.

A 2023 RCT confirmed that inhaling marjoram essential oil during a 2-hour shift significantly reduced perceived stress scores in COVID-19 ICU nurses compared to controls. Traditional use as a nervine for stress is well-documented.

An endogenous pineal hormone with documented anxiolytic and HPA axis-modulating actions. Clinical and preclinical evidence shows melatonin counteracts HPA hyperactivation, reduces stress-induced neuroinflammation, and demonstrates anxiolytic effects in various clinical conditions. Used to mitigate physiological stress responses.

M. officinalis oligosaccharides (MOO) have been repeatedly tested in the chronic unpredictable mild stress (CUMS) model, demonstrating normalisation of stress-induced depression, sexual dysfunction, and HPG axis disruption. MOO modulates neuroinflammation and mitophagy pathways relevant to stress physiology.

Preclinical studies show POEE exhibits adaptogen-like antistress properties, counteracting behavioral and biochemical markers of chronic stress in rodent models. Clinical research has described muira puama extracts as having 'adaptogenic, antifatigue, and antistress' effects, and a root extract has been patented for these properties.

Preclinical evidence from chronic restraint stress (CRS) mouse models shows that P. orientalis leaf-derived extracellular vesicles reduce stress-related behavioral and biochemical markers, including inflammatory mediators and neurotransmitter imbalances. Traditional use of the seeds for anxiety, palpitations, and irritability (all stress-related presentations) is also documented.

The active coenzyme form of vitamin B6, required for the synthesis of GABA, serotonin, and dopamine. As the biologically active form, P-5-P directly supports inhibitory neurotransmitter production critical for stress modulation. Its use for stress is mechanistically grounded and shares the clinical evidence base of vitamin B6.

Passiflora incarnata is widely used traditionally and has clinical evidence for anxiety and stress relief. It modulates GABA levels and serotonin pathways. Multiple RCTs and reviews confirm its efficacy in reducing stress and anxiety symptoms, and it is noted in European phytotherapy monographs.

Clinical trials, including RCTs in cardiac ICU and emergency patients, demonstrate peppermint oil aromatherapy reduces stress-related physiological and psychological parameters. Animal studies show menthol has dose-dependent anxiolytic effects implicating dopamine pathways. Peppermint aroma has been shown to reduce cortisol and subjective anxiety in human study participants.

Two clinical trials of the Relora blend (Magnolia + P. amurense) demonstrated stress reduction. A 2013 RCT in 56 moderately stressed adults showed salivary cortisol reduced by 18% and multiple mood parameters improved (lower stress, tension, anger, fatigue). A 2008 pilot RCT in 40 women reduced transitory state anxiety versus placebo. These are combination product trials, but P. amurense is an active component.

A phospholipid with robust clinical evidence for blunting the HPA axis stress response and reducing cortisol. Multiple RCTs show that 300–400 mg/day reduces ACTH and cortisol responses to acute stressors and lowers perceived stress in chronically stressed adults. FDA-qualified health claims support its cognitive role.

Bioactive compounds in P. tenuifolia, particularly DISS and TMCA, modulate the HPA axis, reduce serum cortisol, ACTH, and CRH in chronic stress models, and protect neurons from corticosterone-induced damage. This provides a mechanistic basis for its traditional use as a 'will strengthener' and stress-relieving herb.

Pregnenolone sits atop the steroidogenic cascade and is a direct precursor to cortisol; chronic stress can divert pregnenolone toward cortisol at the expense of other downstream hormones. Clinical studies show pregnenolone supplementation normalizes HPA axis stress responses and reduces provoked physiological and emotional stress reactivity.

In an open-label clinical trial (n=17, 20 mg/day for 8 weeks), PQQ disodium salt significantly improved self-reported stress, tension-anxiety, and anger-hostility scores on the POMS-SF compared to baseline. Quality of life, obsession, and pain measures also improved.

A 2025 double-blind RCT (n=499) found reishi-ashwagandha significantly improved NIH Perceived Stress Survey scores over six weeks versus placebo. A 2026 RCT of a reishi-containing mushroom blend showed significant PSS and STAI reductions with cortisol and ACTH decreases. Reishi is classified as an adaptogen acting on the HPA axis. TCM has used it for stress-related depletion for millennia.

A proprietary blend of Magnolia officinalis bark and Phellodendron amurense bark standardized to honokiol and berberine. A placebo-controlled pilot RCT demonstrated Relora reduced transient anxiety in premenopausal women. It is used specifically for stress-related cortisol management.

A well-characterized adaptogen from Siberian/Scandinavian traditional medicine. Clinical trials show Rhodiola rosea extracts (standardized to salidroside and rosavins) reduce stress-induced fatigue, burnout symptoms, and cortisol. Multiple RCTs and a 2022 PubMed review confirm its stress-alleviating properties.

A triple-blind RCT (n=82) in menopausal women found 500 mg Rosa damascena extract reduced stress scores from 19.0 to 7.6 versus a slight increase in placebo (p<0.001). A meta-analysis of 28 RCTs confirmed Rosa damascena aromatherapy effectively improves stress symptoms. Evidence is consistent across multiple clinical populations.

A randomized, double-blind, placebo-controlled crossover trial found that four weeks of rosemary extract consumption significantly improved trait anxiety scores and heart rate variability, markers of chronic stress, in healthy adults. A single dose also reduced state anxiety acutely before a mental stressor. These effects are attributed to rosmarinic acid and diterpenes.

Human clinical evidence supports RA-rich lemon balm extracts reducing subjective and physiological stress responses. Double-blind, crossover trials in healthy adults showed reduced negative mood under lab-induced stress (multitasking framework), reduced anger, and improved stress-resilience measures. RA attenuates HPA-axis activation and BDNF dysregulation induced by repetitive stress in animal models.

A 2023 RCT in post-stroke patients showed RJ significantly improved stress scores versus placebo. Animal models show RJ reduces corticosterone in restraint-stressed rats and modulates adrenal steroidogenesis. RJ's B-vitamin content (especially pantothenic acid) further supports adrenal stress response.

Dried stigmas of Crocus sativus with clinical evidence for mood improvement and acute stress response modulation. A double-blind RCT found saffron extract improved mood and blunted cortisol response to psychosocial stress. Its crocins and safranal influence serotonin, dopamine, and NMDA pathways.

Sage (300–600 mg oral dried leaf) improved performance on a computerized stress task battery and enhanced self-rated alertness and calmness in healthy adults in double-blind trials. S. lavandulaefolia essential oil also elevated mood markers under stress conditions. The effect is attributed to cholinergic modulation.

Human and animal data support sceletium's capacity to attenuate acute physiological and psychological stress responses. The 2020 Reay et al. RCT demonstrated reduced heart rate and subjective stress during laboratory stress induction with 25 mg Zembrin®. Traditionally, the plant was consumed by San hunters specifically to reduce stress during demanding activities.

Schisandra was officially recognized as an adaptogen in USSR clinical practice in the 1960s for anti-stress and restorative effects. PubMed evidence documents HPA axis modulation, cortisol suppression, and reduced hypothalamic c-Fos expression under repeated stress. Small human trials show reduced fatigue, improved mood, and stress resilience. Cleveland Clinic confirms schisandra can help the body respond to stress.

Bioactive dibenzocyclooctadiene lignans from Schisandra chinensis, classified as an adaptogen in traditional Chinese and Russian medicine. Schisandrins modulate adrenal cortex function and stress hormones. Schisandra chinensis is included in systematic reviews of adaptogens with RCT-level evidence for stress.

A. julibrissin reduces stress-related hormonal imbalances and physiological markers of stress in animal models. HPA axis regulation and monoamine system effects are documented for specific constituents. TCM use for grief, emotional strain, and chronic stress is long-established.

American skullcap (S. lateriflora) has been tested in human clinical trials for stress and mood. A 2014 randomized double-blind crossover trial (n=43) found significant reductions in Total Mood Disturbance scores. Mechanistically, skullcap's flavonoids bind GABA-A receptors and 5-HT7 serotonin receptors, providing a plausible anxiolytic pathway.

SJW's inhibition of serotonin, dopamine, and norepinephrine reuptake, plus GABA receptor affinity, provides a neurochemical basis for stress resilience. Preclinical studies show SJW significantly attenuates stress-induced oxidative damage and behavioral deficits. It is licensed in Germany for anxiety and nervous unrest.

In RCTs of succinate-based dietary supplements for menopausal syndrome, significant reductions in anxiety and improvements in stress resilience and psychological adaptability were measured using the Spielberger-Hanin State-Trait Anxiety Inventory. Traditional use has also described succinic acid, historically derived from amber, as a nervous system tonic used to relieve stress.

A 20-hydroxyecdysone-enriched fraction from Pfaffia glomerata roots was shown to reduce stress, anxiety, and depression parameters in an acute murine model, while maintaining antioxidant defenses in the cortex and striatum. This preclinical finding supports suma's traditional use as an adaptogenic anti-stress herb.

Animal studies show A. calamus counters stress-induced neurochemical changes, including oxidative imbalance and cortisol dysregulation. A referenced human open-label trial assessed its role in stress-related symptoms using standardized psychological scales. Traditional use as an adaptogenic nervine is well-documented in Ayurveda.

A conditionally essential amino acid found abundantly in the brain, with GABAergic and neuromodulatory properties. Taurine activates GABA-A and glycine receptors to reduce neuronal excitability. Preclinical and emerging clinical evidence supports its role in stress attenuation and reduction of stress-hormone secretion.

A randomized clinical trial in 30 healthy volunteers demonstrated that T. cordifolia (150 or 300 mg/day for 28 days) improved physical performance under stress and suppressed over-activation of the sympathetic nervous system, supporting its adaptogenic classification. Ayurvedic texts describe it as a Rasayana adaptogen.

A landmark RCT (Talbott et al., 2013; JISSN) in 63 moderately stressed adults found 200 mg/day of standardized Tongkat Ali for 4 weeks reduced salivary cortisol by 16% and raised testosterone by 37% versus placebo. Validated mood-state scores showed significant reductions in tension (−11%), anger (−12%), and confusion (−15%). A separate RCT demonstrated improved stress markers and sleep quality in healthy adults. Evidence consistently supports Tongkat Ali as an adaptogen that modulates the cortisol/testosterone ratio under stress.

A well-established European medicinal herb for anxiety and nervous restlessness. Valerenic acid enhances GABAergic activity, reducing anxiety and improving sleep. Commission E and ESCOP monographs approve its use for stress-related nervous restlessness, with clinical trial support.

The vanilla aroma has been shown in controlled human studies to reduce procedural stress and improve mood. The 1994 Sloan-Kettering aromatherapy study in MRI patients demonstrated quantifiable stress reduction with heliotropin (vanilla-like) scent. Animal data also show vanillin reduces anxiety-like behaviors. Evidence is limited to inhalation routes.

A clinical study in 60 infertile men with elevated cortisol demonstrated that 5 g/day of MP seed powder for 3 months significantly reduced serum cortisol (by ~40–49% depending on group, P<0.001) and state anxiety scores. MP is thought to reduce HPA-axis hyperactivation via L-DOPA-mediated dopaminergic tone. This is the strongest human evidence for MP's stress-modulating effect.

A cofactor essential for serotonin, GABA, and dopamine synthesis. High-dose vitamin B6 was found to significantly reduce self-reported stress and anxiety in a clinical trial of 478 young adults. Its role as a rate-limiting cofactor for inhibitory neurotransmitter production makes it mechanistically central to stress modulation.

RCT evidence shows Bacopa monnieri reduces perceived stress and serum cortisol. A 2026 RCT found significant, progressive reductions in Perceived Stress Scale-10 scores and cortisol beginning within 14 days of supplementation.

The principal bioactive steroidal lactones in Ashwagandha (Withania somnifera), directly responsible for its adaptogenic and anti-stress effects. They modulate HPA axis function, inhibit NF-κB, and interact with glucocorticoid receptors to reduce cortisol in stressed subjects, as demonstrated in multiple RCTs.

Adrenal cortex extract has been used in alternative and integrative medicine since the early 20th century to support the body's stress response, based on the premise that supplying adrenal tissue rebuilds cortisol-producing capacity. No well-designed human clinical trial has confirmed this effect for OTC adrenal cortex supplements. The Endocrine Society does not recognize 'adrenal fatigue,' the primary construct underlying this use.

Amber has a documented traditional role in stress relief in both Baltic folk medicine and TCM. TCM describes it as calming the spirit and settling agitation. European traditions used amber tinctures for stress. No human clinical evidence exists.

Saraca asoca (Ashoka tree) is used in Ayurvedic medicine as a nervine tonic for stress, anxiety, and emotional distress, particularly in women. Traditional applications include use for nervous system support and emotional wellbeing. Clinical evidence for stress-specific outcomes is limited; use is primarily traditional.

Astragalus is classified as an adaptogen in traditional Chinese medicine and Western herbalism, used for thousands of years to help the body resist physical, environmental, and emotional stress. Regulatory agencies and authoritative sources characterize it as a theorized adaptogen, but robust human clinical evidence specifically for stress outcomes is currently lacking.

Black spruce essential oil is widely used in aromatherapy for stress relief, attributed to its calming monoterpene and ester profile. Conifer phytoncides including those from spruce have been shown in human studies to reduce cortisol levels. The oil is traditionally associated with adrenal support during periods of chronic stress.

Borage has a long-documented traditional use as an adrenal tonic and restorative following periods of stress, particularly after corticosteroid therapy. Traditional herbalists associate borage with adrenal cortex restoration and mood elevation. There are no rigorous clinical trials confirming stress reduction outcomes.

Vitamin C is required for synthesis of catecholamine neurotransmitters (dopamine, norepinephrine, epinephrine) and cortisol via adrenal steroidogenesis. The adrenal glands have the highest vitamin C concentration of any organ and deplete rapidly under stress. Camu camu's role in stress physiology is mechanistically supported but lacks dedicated human clinical trial evidence; traditional use included mood and mental clarity support.

Triterpenoid saponins from Gynostemma pentaphyllum (jiaogulan), a herb with documented anxiolytic properties in preclinical models and traditional Chinese medicine use as an adaptogen. Included in a systematic review of adaptogenic plants studied in RCTs for stress, alongside Ashwagandha and Rhodiola.

Hawthorn is traditionally used in European and folk medicine for stress-related nervous complaints. Animal studies confirm CNS depressant and anxiolytic activity that supports the traditional rationale. No dedicated human RCTs on stress as a primary endpoint have been published.

Nardostachys jatamansi (Indian spikenard) is a classical Ayurvedic and Tibetan medicine adaptogen for stress, anxiety, and nervous exhaustion. Preclinical animal studies confirm anxiolytic and corticosterone-reducing effects via GABA modulation. Human clinical trials for stress are limited; evidence is primarily traditional and preclinical.

Gynostemma pentaphyllum, a TCM adaptogen ('southern ginseng') with documented anxiolytic and adaptogenic properties. Preclinical models confirm anxiety reduction, and it was included in a 2023 systematic review of adaptogenic plants with clinical RCT evidence for stress. Used in traditional Asian medicine for stress, fatigue, and longevity.

TCM uses lotus seed (particularly the embryo) to calm the mind and treat stress-related mental agitation. Lotus seed's anxiolytic mechanisms (GABAergic, serotonergic) are preclinically established. No human trials specifically test lotus seed for stress as a primary endpoint.

Maca is classified in ethnobotanical and some scientific literature as an adaptogen, traditionally used in the Andes to help the body resist physical and psychological stress. Some human data show improved mood and energy under stressful conditions (e.g., high altitude). Dedicated clinical trials in stress as a primary endpoint are lacking.

Mimulus is traditionally grouped with Aspen and Rock Rose as Bach remedies for anxiety and stress, particularly where stress arises from identifiable fears or worries about everyday situations. The Bach system frames Mimulus as appropriate for the stress experienced by nervously constituted individuals facing known challenges. No controlled clinical evidence supports this use.

Peppermint is used traditionally across European and Middle Eastern herbal medicine for stress-related digestive and nervous system symptoms. Its antispasmodic effects on the GI tract relieve stress-induced abdominal symptoms. Aromatherapy use for stress relief is widely documented in herbal practice.

Multiple ethnomedicinal systems document A. vulgaris for stress and nervous tension, particularly the root as an adaptogenic tonic in Ayurveda. TCM moxibustion is used for stress reduction. Mechanistic support comes from sedative and MAO-inhibiting properties of plant constituents. No human RCTs exist.

C. rotundus is used in TCM and Ayurveda as a Qi-regulating, nervine-tonic herb for stress-related conditions. It is described as particularly effective for gynecological conditions worsened by stress. Sedative and anxiolytic preclinical data are consistent with a stress-modulating role, though no human RCTs exist.

Stress is a documented traditional use of Citrus sinensis across Chinese, Ayurvedic, and European herbalism. Orange essential oil has been traditionally used as a nervine to reduce stress, and clinical aromatherapy evidence for anxiety reduction supports this use. The boundary between calm/anxiety and stress is pharmacologically overlapping.

Pituitary substance has been used in glandular therapy traditions as part of HPA axis support protocols for stress, given the pituitary's central role in releasing ACTH to drive cortisol production. Naturopathic practitioners cite stress resilience as a key indication. No clinical data exist for the oral supplement form.

Polygala root has traditional use in TCM for neurasthenia and stress-related mental exhaustion, and preclinical data show modulation of the HPA axis and reduction of stress-induced neurological damage. Human evidence for stress as a primary endpoint is lacking, but BT-11 has been shown to reverse stress-induced memory deficits in rodents.

California poppy and P. rhoeas are both used in traditional herbalism for stress and nervous tension. The GABAergic mechanism of California poppy alkaloids and the mild sedative properties of P. rhoeas rhoeadine underlie these uses. No human clinical trials specifically targeting stress endpoints have been conducted.

Rehmannia is used in modern herbal medicine and TCM to support the body under chronic stress, particularly by modulating adrenal function and reducing the physiological consequences of sustained stress. Preclinical studies show Rehmannia improved antioxidant capacity in chronic mild stress mouse models. Its traditional role as a kidney yin tonic addresses the depletion pattern associated with prolonged stress.

Rehmannia is used as an adaptogenic herb in TCM and Western herbal medicine for stress recovery and resilience. It is described as an adrenal tonic for stress-induced depletion. Preclinical evidence includes anti-stress effects via adrenal and nervous system modulation.

A primary dibenzocyclooctadiene lignan from Schisandra chinensis, classified as one of the principal bioactive adaptogenic compounds. Shares the stress-modulating mechanistic and traditional evidence base of schisandrins and Schisandra as a whole, with HPA axis and adrenal cortex modulating activity.

Poria cocos sclerotium has been used in TCM for over 2,000 years as a 'spirit-calming' herb to address mental unrest and stress. Preclinical data show GABAergic and serotonergic modulation that is biologically consistent with stress reduction, though dedicated human stress trials are absent.

Anti-stress properties are attributed to Annona muricata in the pharmacological literature, alongside its anxiolytic and sedative traditional applications. The evidence is primarily based on documented traditional use and pharmacological characterisation of CNS-active alkaloids.

S. indicus is classified as a Rasayana (adaptogenic-rejuvenating) herb in Ayurveda and is traditionally used for promoting inner calm and managing stress. Preclinical CNS depressant and anxiolytic activities support an anti-stress mechanism, but no dedicated adaptogen study has been published.

Nardostachys jatamansi (spikenard) is an Ayurvedic and TCM nervine herb traditionally used for stress, anxiety, insomnia, and emotional exhaustion. Preclinical studies confirm anxiolytic and sedative actions via GABA receptor modulation. Limited human clinical trial data; evidence is primarily traditional and preclinical.

Black spruce essential oil is used in aromatherapy as a calming, grounding, and restorative agent for stress and anxiety. Its resinous, forest-like scent is associated with shinrin-yoku (forest bathing) benefits. French aromatherapy documents its use for adrenal stress management. No clinical RCTs on spruce specifically for stress have been conducted.

Star of Bethlehem is a component of Bach Rescue Remedy, which is specifically marketed and traditionally used for acute stress relief. It is used in holistic practices to alleviate stress and promote emotional balance. Systematic reviews have not found consistent evidence of benefit over placebo, though one double-blind trial reported a subgroup benefit in high-anxiety individuals.

Triphala is classified as an adaptogen in Ayurveda and is listed as having 'adaptogenic' activity in several scientific reviews. Animal studies demonstrate protection against cold- and noise-induced stress, mediated through antioxidant and neuroendocrine mechanisms. Human clinical adaptogen trials specific to Triphala are absent.

Pantothenic acid is a precursor to coenzyme A (CoA) and is essential for adrenal cortex function and cortisol synthesis. Traditionally used in nutritional medicine as the 'anti-stress vitamin' to support adrenal function during stress. Clinical evidence for direct stress symptom reduction is limited but mechanistic support is strong.

Stress management is the principal proposed use of whole adrenal glandular, listed by EBSCO Research Starters as its primary traditional indication. The rationale is that whole adrenal tissue nourishes HPA axis function and adaptive stress capacity. This is rooted in early 20th-century organotherapy practice. No rigorous human clinical trials confirm efficacy for stress outcomes.

Wood betony has centuries of documented use in European folk medicine as an antistress and nerve tonic herb, used for states of mental fatigue, stress-related digestive upset, and nervous depletion. The alkaloid stachydrine is under preliminary investigation for stress-resilience roles. No human trials exist.