Diarrea

Astragalus has a natriuretic property identified as one mechanism of its renoprotective effect in CKD. In TCM it is used for edema and described as resolving 'less urine' and 'puffy' conditions. A clinical RCT in CKD patients showed improvements in renal fluid-handling markers (eGFR, UACR).

Bromelain has well-documented anti-edematous properties demonstrated in multiple clinical and preclinical studies. It degrades extracellular matrix proteins, reduces tissue fluid accumulation, inhibits bradykinin-mediated vascular permeability, and is used clinically for post-surgical and post-traumatic edema. Clinical trials in orthopedic surgery and CVI confirm significant reductions in edema.

Multiple clinical trials have demonstrated that butcher's broom (typically in combination with hesperidin methyl chalcone and ascorbic acid as Cyclo 3 Fort) significantly reduces edema in patients with chronic venous insufficiency and post-surgical lymphedema. A double-blind RCT in breast cancer lymphedema patients showed a 12.9% reduction in arm volume (p=0.009) versus placebo.

Caffeine is a well-established mild diuretic that acts by inhibiting renal tubular sodium and water reabsorption and by blocking adenosine receptors, increasing urine output. It is recognized as a natural diuretic in peer-reviewed literature and is an ingredient in OTC PMS and water-retention formulas. Green tea, black tea, coffee, and guarana are all recognized as diuretics primarily due to their caffeine content.

Water retention is a recognized PMS symptom tracked in Vitex clinical trials, and multiple trials document its improvement as part of overall PMS symptom reduction. The mechanism involves opioid receptor activity and endorphin normalization in the late luteal phase, which is linked to fluid balance. Dedicated trials on fluid/water retention as a primary endpoint are lacking.

Chloride is the major extracellular anion and, together with sodium, is the primary determinant of extracellular fluid volume. Changes in chloride homeostasis directly affect fluid distribution and retention across body compartments. This is well established in physiology and clinical medicine.

Corn silk's diuretic activity has been confirmed in multiple animal studies, supporting its traditional use for edema and fluid retention. A 2005 rat study (PMID 15957371) directly measured increases in urinary water and electrolyte excretion. The EMA assessment references a 2015 study confirming mild diuretic activity in normal rats.

Cucumber's potassium and high water content support fluid balance by promoting sodium excretion, vasodilation, and increased urine output. It is classified as a natural diuretic food in clinical dietetics contexts, and the potassium-mediated natriuretic mechanism is well-established physiologically.

Taraxacum officinale leaf has a long history as a diuretic in European, Asian, and American traditional medicine, and is approved by the German Commission E for stimulation of diuresis. A human pilot study (n=17) demonstrated significant increases in urinary frequency and volume after leaf extract dosing. Animal studies show diuretic activity comparable to furosemide at high doses.

Foeniculum vulgare (fennel) is specifically identified in a peer-reviewed 2007 systematic review of herbal diuretics (J. Ethnopharmacology, PMID 17804183) as one of the most promising herbal agents for promoting diuresis based on urine volume and sodium excretion data. It is used traditionally in Mediterranean and Ayurvedic medicine for water retention and urinary support.

Poria cocos is one of the most extensively documented TCM diuretics, with the Chinese Pharmacopoeia listing edema and oliguria as primary indications. Animal studies confirm ethanol extracts of the surface layer produce marked diuresis, and the mechanism involves the AVP-V2R-AQP2 water channel axis. Clinical human data are limited.

Goldenrod has a well-documented diuretic ('aquaretic') action recognized by the EMA and the German Commission E. The mechanism involves saponins increasing renal blood circulation and glomerular filtration, promoting urinary output without significant electrolyte loss. This action is used clinically in Europe as adjuvant irrigation therapy. The EMA explicitly notes that goldenrod increases the flow of urine.

Multiple RCTs demonstrate that Gotu Kola reduces lower-extremity edema and ankle swelling in venous insufficiency and diabetic microangiopathy patients. A study also showed reduction in flight-related leg swelling. The mechanism is reduction in capillary filtration rate and improved venous tone, both clinically validated.

GSE OPCs have documented efficacy in reducing edema associated with chronic venous insufficiency in double-blind controlled trials. A study of 71 subjects found grape seed OPCs (100 mg three times daily) significantly reduced swelling, heaviness, and leg discomfort. GSE improved inferior vena cava blood flow in a 2022 pilot MRI study. These effects reflect improved venous and microvascular tone rather than diuretic activity.

GSE reduces post-surgical and venous insufficiency-related edema. RCTs demonstrate GSE lowers leg swelling in women during prolonged sitting and in patients with chronic venous insufficiency. Proanthocyanidins reduce capillary permeability, the primary driver of fluid leakage into tissues.

Green tea's diuretic and mild fluid-reducing properties are attributed to its caffeine and catechin (EGCG) content, both of which stimulate renal filtration and promote sodium and water excretion. Peer-reviewed reviews identify green and black tea as natural diuretics, and their effects on fluid balance are recognized by authoritative health literature. Catechins may contribute independently of caffeine via adenosine receptor inhibition.

Hesperidin, primarily as part of the diosmin/hesperidin combination, is clinically used to reduce edema and fluid retention associated with chronic venous insufficiency. Its venotonic and capillary-sealing properties reduce pathological capillary leakage, a primary driver of tissue edema and fluid imbalance in venous disorders.

Hibiscus sabdariffa (roselle) is recognized in a 2007 peer-reviewed systematic review (Journal of Ethnopharmacology) as one of the most promising herbal diuretics, with documented increases in urine output and sodium excretion in both animal and human studies. Clinical trials show it can reduce blood pressure comparably to low-dose hydrochlorothiazide without causing electrolyte imbalance. It is traditionally used across Africa, Asia, and Latin America for hypertension and fluid regulation.

HCSE has robust clinical evidence for reducing venous-origin leg edema. In the landmark Diehm et al. RCT, HCSE reduced lower leg volume comparably to compression stockings. Aescin reduces capillary permeability, inhibits hyaluronidase, and weakly promotes diuresis—together counteracting fluid accumulation in tissues.

Equisetum arvense (horsetail) has been used traditionally for edema and urinary conditions across European and Latin American herbal medicine. A randomized, double-blind clinical trial in 36 healthy men found its extract produced significant diuretic effects over 24 hours, comparable to hydrochlorothiazide (25 mg/day) while maintaining electrolyte balance. Its flavonoids and mineral-silica content are considered key active constituents.

Lemongrass displays a weak to moderate diuretic activity documented in both animal studies and in humans. A comprehensive 2022 review confirmed this diuretic effect in both animal and human subjects and proposed it as one mechanism contributing to the plant's antihypertensive action. Mechanisms remain incompletely characterized.

Magnesium is a key electrolyte that maintains optimal fluid balance and electrolyte homeostasis, and clinical evidence supports its role in reducing fluid retention specifically in PMS. A clinical study found magnesium supplementation alleviates PMS-associated fluid retention symptoms including bloating and extremity swelling. NIH MedlinePlus and StatPearls recognize magnesium as essential for fluid and electrolyte regulation.

Onion has demonstrated diuretic properties in preclinical studies, documented across multiple pharmacological reviews. Hippocrates historically prescribed onion specifically for its diuretic effect. The quercetin in onion has been shown to downregulate renal angiotensin-I receptor expression and increase urinary sodium and volume excretion.

Clinical studies show Pycnogenol reduces peripheral edema and leg swelling, including in pregnant women, long-haul flight passengers, and patients with chronic venous insufficiency. Its vasoprotective and anti-inflammatory actions reduce capillary permeability and venous stasis. Controlled studies documented reduction of edema in hypertensive patients and travelers.

Water retention and edema are the primary and best-evidenced indications for P. umbellatus across both TCM and preclinical pharmacology. Ergone, ergosterol, and D-mannitol act as multicomponent diuretics with Na⁺/K⁺ ion regulation and aldosterone-blocking mechanisms.

Potassium is the primary intracellular cation and its balance with sodium directly governs fluid distribution between body compartments. Higher potassium intake promotes renal sodium excretion (natriuresis) and reduces extracellular fluid retention. This mechanism is well-established in NIH/NCBI physiology literature and StatPearls, and potassium is a recognized clinical intervention for sodium-related fluid retention.

Progesterone acts as a natural antagonist of aldosterone at the mineralocorticoid receptor, opposing sodium and water retention. Progesterone deficiency in the luteal phase is associated with fluid retention. A PMC study on sex hormone effects on body fluid regulation confirms progesterone's influence on AVP threshold and sodium-regulating hormones.

Punarnava is one of Ayurveda's foremost diuretic herbs, and this property has been substantiated in animal and some clinical research. Studies show it increases urinary output, promotes sodium and chloride excretion, and maintains potassium levels. The Sushruta Samhita specifically records its use for dropsy and abdominal edema. It is the herb's best-documented pharmacological action.

Rutin and its derivatives are used as venoactive phlebotonic agents for chronic venous insufficiency, with clinical trials demonstrating reductions in leg edema and improved venous tone. A double-blind study in CVI patients using rutin with vitamin C reported 30% leg-volume reduction over 8 weeks.

Poria cocos sclerotium is one of the most documented diuretics in TCM, used to treat edema for over 2,500 years. Animal studies confirm diuretic effects, with the sclerotium shown to modulate the AVP-V2R-AQP2 water regulation axis in heart failure rat models.

Serratiopeptidase has documented anti-edemic effects across multiple clinical settings—post-surgical swelling, breast engorgement, and traumatic swelling after sports injury. The enzyme reduces tissue fluid accumulation by degrading fibrinous deposits and improving microcirculation/lymphatic drainage. Multiple RCTs demonstrate significant reductions in measurable edema/swelling versus placebo.

Sodium is the primary extracellular cation and the principal determinant of extracellular fluid volume. Clinical studies and controlled metabolic ward investigations confirm that sodium load directly influences fluid retention, though the relationship is more nuanced than a simple sodium-equals-water equation. Higher sodium-content IV maintenance fluids produce a more positive fluid balance than lower-sodium formulations.

Vitamin B6 (pyridoxine) is recognized by authoritative medical sources including URMC and clinical pharmacology literature as having mild diuretic properties, particularly in the context of PMS-associated water retention. Clinical trials show B6 supplementation reduces PMS symptoms including fluid retention and bloating. It is used clinically as a diuretic adjunct specifically for hormonal fluid retention.

Adzuki bean is one of the most celebrated natural diuretics in TCM (Chi Xiao Dou), formally indicated in the Chinese Pharmacopoeia for reducing edema and promoting diuresis. Its high potassium-to-sodium ratio supports fluid excretion. Scientific clinical evidence for diuretic efficacy in humans is lacking.

Agrimony's diuretic properties are documented in traditional European medicine and referenced in the EMA assessment literature, where it is used for oedema and fluid retention. An Italian pharmacological study examined its diuretic and uricosuric activity. This remains traditional use with no controlled human trials in oedema.

Ajwain is documented as a diuretic in multiple traditional medicine systems including Ayurvedic, Unani, and traditional Persian medicine. It is listed as 'Mudirr-i-Bawl' (promotes urination) in Unani classification. Preclinical diuretic activity is noted in ethnopharmacological literature, but no human trial evidence exists.

Alfalfa has a well-documented traditional use as a diuretic across Ayurvedic, early American, and Arab herbal medicine systems. It is described in pharmacological monographs as having diuretic properties. MSKCC notes this use is not backed by experimental human evidence.

Artichoke has been used as a diuretic in traditional European medicine since Roman times. The EMA HMPC monograph and European Pharmacopoeia (Cynarae folium) list 'traditionally used to promote urinary and digestive elimination functions.' No dedicated human RCTs measuring diuretic output or edema specifically are available.

Asparagus (Asparagus officinalis) has been used as a folk remedy for fluid retention for centuries and is recognized by multiple health sources as a natural diuretic. It contains asparagine, an amino acid with mild diuretic activity, and a compound asparagusic acid. It is listed among natural diuretic foods in evidence-based reviews alongside dandelion and parsley, though controlled human trial data are limited.

In TCM, Atractylodes macrocephala is one of the primary herbs for 'eliminating dampness' and promoting fluid metabolism, with documented diuretic properties. This is a classical indication. Pharmacological studies have confirmed diuretic-like effects, but controlled human clinical trials are absent.

Banaba leaves have a documented traditional use as a diuretic in Southeast Asian folk medicine, particularly in the Philippines. Preclinical studies in rats have evaluated the diuretic activity of various leaf extracts against positive controls including furosemide, with measurable effects on urine volume and electrolytes. No human diuretic clinical trials have been conducted.

Birch leaf is formally recognised by the EMA HMPC and ESCOP as a mild diuretic for promoting urine flow. Its use for oedema and fluid retention is documented in multiple European herbal traditions. Birch leaf diuresis has been attributed to its high potassium content and flavonoid constituents. Unlike pharmaceutical diuretics, it is described as potassium-sparing.

Bladderwrack (Fucus vesiculosus), a brown seaweed, has been used in traditional European coastal herbal medicine as a mild diuretic and metabolic tonic. Its fucoidan and alginic acid content are attributed with mild diuretic and fluid-regulatory effects. It appears in traditional diuretic formulations and is referenced in legal patent literature as a herbal diuretic agent.

Blessed thistle is traditionally classified as a diuretic, increasing urine output and thereby reducing fluid retention. This property is documented in historical herbals and pharmacopoeia monographs. The herb is also noted as being rich in potassium and sodium, electrolytes relevant to fluid balance. No clinical trials support diuretic efficacy in humans.

Borage leaf infusions have a documented traditional use as a diuretic to promote fluid elimination and reduce water retention. This use is recorded in European herbal tradition and supported by the presence of potassium nitrate and other diuretic compounds in the leaves.

Buchu leaf (Agathosma betulina) has been used for centuries by the indigenous Khoikhoi people of southern Africa and widely adopted in 19th-century Western medicine as a diuretic and urinary antiseptic. It remains listed in licensed herbal medicinal products (e.g., HRI Water Balance in the UK) for mild water retention, based on traditional use. Clinical trial evidence in humans specifically for diuresis is limited.

Burdock root is recognized across European and TCM herbalism as a diuretic that increases urine production and reduces fluid retention (edema). The EMA monograph cites this as a traditional indication. Historically it was used for dropsy (generalized edema). Herbal Reality identifies 'reducing fluid congestion and relieving urinary discomforts' as one of burdock's core traditional actions.

Caraway has documented traditional diuretic use in Moroccan and European herbal medicine. A PubMed-indexed pharmacological study assessed diuretic activity of caraway aqueous extract in rats, confirming urine output increase. Animal-level evidence exists, but human clinical evidence for diuretic effects is absent.

Celery (Apium graveolens) is recognized as a natural diuretic in traditional European and Ayurvedic medicine and in multiple evidence-based nutrition reviews. Active phthalide compounds promote renal vasodilation and natriuresis. Its high potassium content and documented renal effects make it a commonly cited dietary agent for mild fluid retention.

A. aspera is traditionally used for dropsy (edema) and fluid retention, with its diuretic properties being key. Animal studies confirm diuretic activity of the aqueous extract.

Chickweed's mild diuretic properties have led to its traditional use for fluid retention and edema, promoting urine output to reduce bloating and puffiness. Multiple herbalist sources document this use. No human clinical data exist.

Diuresis and fluid balance is one of the best-attested traditional actions of cleavers, used for edema, dropsical swellings, and water weight. Preclinical animal studies confirm increased urinary volume with extracts. Human trials are lacking.

Clematis has documented traditional use as a diuretic across European and TCM traditions, with fluid retention listed among recorded indications. Animal research identified oleanolic acid from C. montevidensis as a diuretic-active constituent. RxList and ScienceDirect review sources confirm this traditional use.

Draining dampness and promoting diuresis to reduce edema is the canonical primary use of coix seed in TCM. Classical pharmacopeias and modern TCM references consistently list it for edema, ascites, and fluid accumulation.

Corn silk has centuries of documented use as a diuretic in traditional Chinese medicine, Native American herbalism, and Turkish folk medicine. It is traditionally used to reduce edema by increasing urine output. Preclinical data support diuretic activity, but robust human clinical trials are absent.

Dog Rose hips have a well-established traditional use as a mild diuretic, used in European folk medicine to reduce water retention and oedema. Multiple herbal traditions and pharmacopoeial references document this diuretic action, though no modern human clinical trials specifically for fluid retention have been conducted.

Diuretic properties of European elder are documented since antiquity, with Pliny the Elder attributing diuretic effects to the plant. The EMA and traditional European herbalism recognize elderflower as a diaphoretic and diuretic. No human clinical trials have specifically tested elderberry's diuretic activity.

Forsythia has documented traditional use as a diuretic in TCM, with classical texts noting it 'smooths urination' and treats urinary stranguria. It is described in ethnopharmacological sources as having diuretic properties for fluid balance. No clinical or preclinical studies specifically evaluating this diuretic effect have been identified in the indexed literature.

Geranium is traditionally used as a diuretic and lymphatic stimulant to address water retention and fluid balance. Multiple traditional herbal sources confirm this use. No human clinical diuretic trials have been conducted.

Gravel root is listed among traditional herbal diuretics and was used for 'dropsy' (fluid retention/edema) in Eclectic medicine. Its diuretic action is documented in multiple historical sources and herbal pharmacopeias. No human trials confirm efficacy.

Hawthorn (Crataegus spp.) has been used in traditional European and Chinese herbal medicine as a cardiac tonic thought to improve circulatory function and reduce fluid retention associated with mild heart insufficiency. Animal studies show hawthorn procyanidins increase urine flow and sodium excretion, supporting its traditional cardiovascular-diuretic use. Robust human trials specifically on fluid retention remain limited.

Holly leaves and roots have a well-documented traditional use as a diuretic across European herbal medicine. Infusions and decoctions of leaves were used to treat dropsy (edema), rheumatism, and gout through promotion of urination. No clinical evidence is available.

Horehound has been used traditionally as a diuretic to promote urine flow and reduce fluid retention. This property is documented in multiple ethnobotanical sources and Western herbal texts. No controlled clinical studies on diuretic activity in humans have been published.

Horseradish has a well-documented traditional use as a diuretic agent. The glucosinolate sinigrin is attributed with stimulating diuresis and preventing fluid accumulation. European herbalists historically used it for oedema and kidney stones. No clinical trials have evaluated its diuretic effect in humans.

Hydrangea root has a documented traditional use as a diuretic herb in North American and Chinese herbal medicine, with its purported ability to increase urine output applied to relieve edema and water retention. TCM records its use for edema under the kidney meridian. No human studies confirm diuretic efficacy.

Indian sarsaparilla is documented as a diuretic in Ayurvedic, Siddha, Unani, and historical European medicine. Saponins are identified as active constituents promoting urinary and sweat output. The diuretic property is one of its classical Ayurvedic indications, though no controlled human diuretic trials have been published.

Juniper berries (Juniperus communis) have been used across European traditional medicine for centuries as a diuretic to reduce fluid retention. The volatile oil constituent terpinen-4-ol is identified as the primary active compound increasing urine volume without significant electrolyte loss. Recognized by authoritative institutional sources including PeaceHealth and traditional pharmacopeias, though robust human RCT data remain limited.

Lophatherum leaf is recognized in TCM and in pharmacological literature as having diuretic properties, promoting urination and eliminating 'damp-heat' from the body. TCM texts consistently describe its role in resolving fluid retention associated with internal heat. Pharmacological studies confirm diuretic effects in extracts, though human studies are absent.

Milkweed was among the most commonly cited traditional remedies for dropsy (pathological fluid retention). Both A. syriaca and A. tuberosa were used as diuretics in Indigenous North American and 19th-century Eclectic medicine. Milkweed was listed in 19th-century pharmacopeias specifically for dropsy. No clinical evidence exists.

Mullein is described in traditional herbal texts as a mild diuretic suited to edema and water retention. The Worts & Cunning herbal profile specifically notes its use for edema. Diuretic activity has been experimentally confirmed in a related Verbascum species (V. nigrum, Tandfonline 2013).

Urtica dioica (stinging nettle) leaf is approved by the German Commission E and the European Scientific Cooperative on Phytotherapy (ESCOP) for use as a diuretic in irrigation therapy for urinary tract conditions and edema. An Iranian clinical trial of 287 patients found nettle tea reduced kidney pain, attributed to its diuretic activity. It is widely used in European traditional herbal medicine for fluid retention.

C. rotundus is classified as a diuretic in multiple traditional systems of medicine including Ayurveda and Unani. It is listed as promoting urination in Ayurvedic pharmacopeias. Preclinical evidence for diuretic activity is referenced in the traditional medicine literature.

P. orientalis leaves have documented diuretic properties in traditional medicine across multiple Asian systems, and pharmacological reviews confirm diuretic activity in the plant. WebMD/NLM list water retention as a traditional indication. Preclinical evidence also supports the diuretic effect.

Parsley (Petroselinum sativum/crispum) is identified as one of the most promising herbal diuretics in a 2007 peer-reviewed systematic review (J. Ethnopharmacology, PMID 17804183). Animal studies show diuretic and natriuretic activity, and its flavonoids are proposed to act on adenosine A1 receptors to inhibit sodium reabsorption and increase urine output. It is widely used in traditional medicine across the Middle East, Mediterranean, and Americas for water retention.

Peach flowers and leaves are classified as diuretic in multiple traditional systems including TCM, Eclectic medicine, and folk herbalism. Peach flowers are specifically used in TCM for edema and dysuria. No clinical studies exist.

Pennycress has been used in traditional European and Persian medicine to stimulate urine flow and reduce fluid retention. The plant is classified as a diuretic and was prescribed for bloating and urinary issues. No clinical studies have evaluated this use.

Queen of the meadow is recognized by the ESCOP as a traditional herb for increasing water excretion. It has a long-documented traditional use as a diuretic for edema, fluid retention, and related conditions. The EMA HMPC monograph and multiple pharmacopeial references support this use. Human clinical evidence is lacking.

Rose hip has documented traditional use as a mild diuretic (increasing urine flow) for the management of fluid retention and edema, listed specifically by RxList among its traditional uses. The organic acids (citric, malic) and plant acids in rose hip are the proposed active principles for mild diuretic activity.

Sarsaparilla is classically documented as a diuretic in European, American, and Chinese herbal pharmacopeia. Increased urination has been clinically observed as a side effect, lending some indirect support. Traditional use as a fluid-balancing herb is well-established; controlled trials for water retention specifically have not been conducted.

Scrophularia root is classified as a diuretic in multiple Western herbal traditions and has been used to relieve fluid retention and bloating. RxList records its use as a 'water pill.' Several Scrophularia species are documented as diuretics in folk medicine. No clinical trials have evaluated this indication.

Shepherd's purse has well-documented diuretic properties recognized across European, Chinese, and North American traditional medicine and confirmed in pharmacological animal studies. It is traditionally used for edema and fluid retention, including edema associated with kidney or cardiovascular conditions. The 1898 King's American Dispensatory describes it as 'mildly stimulating, astringent, and diuretic.'

Smartweed is documented as a diuretic in multiple traditional medicine systems across Europe, South Asia, and East Asia. Its diuretic classification is consistent across ethnobotanical sources. No human diuretic trials have been published.

Sarsaparilla is traditionally used as a diuretic across European, Asian, and Latin American herbal systems, and it appears in historical pharmacopoeias as a diuretic tonic. German Commission E has noted that sarsaparilla may cause increased urination. No controlled clinical trials confirm diuretic efficacy.

Solomon's seal is documented as a mild diuretic in multiple herbal traditions, including European folk medicine and TCM. Drugs.com notes topical application for edema (water retention). Traditional use is documented for rheumatism, gout, and kidney stone associated fluid complaints.

Squawvine is documented as a traditional diuretic used by the Cherokee and Iroquois, and multiple folk medicine sources list it for edema and water retention. Pharmacobotanical references attribute diuretic properties to the plant's glycoside constituents. No clinical studies exist.

Star of Bethlehem has a documented traditional use as a mild diuretic, and individual case reports from the 1950s–1960s described reduced leg edema in CHF patients treated with the plant. The cardiac glycoside content shares mechanistic parallels with digitalis, which has established diuretic-promoting effects in heart failure via improved cardiac output. No controlled clinical trials have examined this use.

Tribulus is traditionally classified in Ayurveda as a diuretic (mutrala) herb, used to reduce edema and fluid retention. Its diuretic properties have been confirmed in animal pharmacological studies. Traditional use for water retention during menstruation and menopause is documented.

Watercress is a documented traditional diuretic used across European, Iranian, and other folk medicine systems to treat water retention, oliguria, and edema. RxList, WebMD, and PMC narrative reviews confirm its recognized diuretic properties. Its high potassium, magnesium, and calcium content support this mechanism.

Watermelon (Citrullus lanatus) is recognized as a natural diuretic in traditional and evidence-based food medicine, attributed to its high water content, significant potassium content (approximately 170 mg per 100 g), and the amino acid citrulline which supports renal blood flow. Multiple natural-diuretic reviews and dietary medicine references cite watermelon as supportive for mild fluid retention.

Yarrow has traditional use as a diuretic across multiple herbal systems, with aerial parts specifically employed to increase urine output and relieve fluid retention. A diuretic effect has also been demonstrated in animal studies.