Evidence supporting the use of: N-acetyl-cysteine (NAC)
For the health condition: Anxiety

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

N-acetyl-cysteine (NAC) has garnered some scientific interest as a potential adjunctive treatment for anxiety disorders, although the evidence base is still emerging and not robust. NAC is a precursor to the antioxidant glutathione and has been studied primarily for its effects on oxidative stress and glutamate modulation in the brain. Several small clinical trials and animal studies suggest that NAC may have anxiolytic (anxiety-reducing) effects, possibly by modulating glutamatergic neurotransmission and reducing oxidative stress, both of which are implicated in the pathophysiology of anxiety disorders.

For example, open-label studies and a few controlled trials have explored NAC’s efficacy in conditions where anxiety symptoms are prevalent, such as obsessive-compulsive disorder (OCD), trichotillomania, and post-traumatic stress disorder (PTSD). Some of these studies have shown modest reductions in anxiety symptoms, often as a secondary outcome, but results are inconsistent and sample sizes are often small. A handful of systematic reviews and meta-analyses suggest that while NAC may have some benefit, the quality of evidence is low, and more rigorous, large-scale randomized controlled trials are needed.

In summary, while there is some scientific rationale and preliminary evidence suggesting NAC could support anxiety management, the overall strength of evidence is limited (rated 2 out of 5). NAC is not a first-line treatment, and its use for anxiety should be considered experimental pending further research. Always consult a healthcare provider before using NAC for anxiety.

More about N-acetyl-cysteine (NAC)
More about Anxiety

Other ingredients used for Anxiety

5-Hydroxytryptophan (5-HTP)
7,8-Dihydroxyflavone
Aconite
Agarwood
Agastache
Agmatine
Agrimony
Albizia
Alpha lactalbumin
alpha-pinene
alpha-terpineol
amino acids
Amor seco
anamu
Anemone
aniracetam
anise
apigenin
Ardisia
ash
ashwagandha
Asteraceae
Bacopa
Bacopin
bacoside
bacteria
baicalein
baicalin
Baikal Skullcap
balsam
basil
bayleaf
bee products
benegut perilla (proprietary)
bergamot
beta caryophyllene
betony
Bifidobacteria
Bifidobacterium
Bifidobacterium adolescentis
Bifidobacterium bifidum
Bifidobacterium infantis
Bifidobacterium lactis
Bifidobacterium longum
black cumin
black seed
blackboard tree
Bombax
borneol
brahmi
Bupleurum
bupleurum falcatum
calamus
Calea zacatechichi
California poppy
Camellia sinensis
cannabidiol
cannabigerol
Cannabis sativa oil
Canscora
capillary artemisia
Capitate Valerian
cardamom
caryophyllene
catnip
catuaba
Centella asiatica
Centella triterpenes
chamomile
Chinese raisintree
Chinese salvia root
chrysanthemum
Cinnamomum
citron
Clary sage
Clerodendrum indicum
Clostridium butyricum
clove
cocoa
Convolvulus pluricaulis
Convolvulus prostratus
cordyceps
cowslip
Curcuma
curcumin
Cymbopogon martini
damiana
DHA (docosahexaenoic acid)
dodeca-2E, 4E-dienoic acid isobutylamide
dragonhead
epigallocatechin gallate (EGCG)
Erythrina
essential oil blend
eugenol
fatty acids
fennel
Ficus religiosa
fragrant rosewood
fungus
ganoderma
gardenia
Gardenia jasminoides
gastrodia
gastrodin
Gelsemium
geranium
ginkgo biloba
ginseng
Ginsenosides
Glycine
gotu kola
Greek mountain tea
green tea
Griffonia simplicifolia
guayusa
heal-all
hemp
hemp oil
Herb Robert
herbal blend (proprietary)
hericium mushroom
honeybush
Honokiol
hops
hyperforin
Hypericum
Hyperoside
Ilex
Indian fagonia
Indian tinospora
indigo leaves
inositol
iridoids
isoliquiritigenin
jasmine
Jatamansi
jujube
jujubosides
kanna
kava
kavalactones
Kefir
kudzu
L-glycine
L-theanine
L-tryptophan
lactiplantibacillus plantarum
lactium casein decapeptide
Lactobacillus brevis
Lactobacillus fermentum
Lactobacillus gasseri
Lactobacillus helveticus
Lactobacillus johnsonii
Lactobacillus paracasei
Lactobacillus plantarum
Lactobacillus reuteri
Lactobacillus rhamnosus
Lactobacillus salivarius
Lactococcus rhamnosus
Lactucarium
Lactucopicrin
Large-leaved linden
Lavandin
lavender
lemon balm
lemongrass
ligustilides
limonene
linalool
linden
lingzhi
lion's mane
lithium orotate
Litsea
longan
lotus
lupulinum
Lycopodium
maca
magnesium
magnolia
magnolol
Marjoram
Matcha
Melatonin
Mentha haplocalyx
Menthol oil
Mesembrine
Mimosa
Mimulus
Mint
Monkey flower
Monoterpenes
Motherwort
Mugwort
Muira puama
Mulungu
Myrcene
N-acetyl-cysteine (NAC)
Nardostachys
Nigella seed
Nutmeg
Nymphaea caerulea
Nymphaea nouchali
omega-3 fatty acids
oolong tea
oriental arborvitae
Oroxylum indicum
Osmanthus
Oxindole alkaloids
paeoniflorin
passionflower
Passionfruit
Patchouli oil
peony
Petiveria
Phellodendron
phellodendron amurense
Phenylpropanoids
phosphatidylserine
phytocannabinoids
Plectranthus amboinicus
Polygala
polygala root
poppy
prebiotic blend (proprietary)
pregnenolone
prepared aconite tuber
probiotics
Puerain
Pulsatilla
Purple Monkeyflower
pyridoxal-5-phosphate (P-5-P)
Rauvolfia
reishi mushroom
relora® (proprietary)
rhizome
Rhodiola
Rooibos
rosavins
rose
rose oil
rosemary
rosmarinic acid
rue
saffron
Safranal
sage
Salidroside
Salvia
SAMe (S-adenosyl-L-methionine disulfate p-toluensulfate)
Sandalwood
sceletium
Schisandrins
Schizandrol A
Scleranthus annus
Scoparia dulcis
Self-Heal
Sensitive Plant
Sesquiterpenes
Sete sangrias
Shankhpushpi
shen-chu
silk tree
skullcap
Sophora
soursop
Southern Tsangshu
Southernwood
spearmint leaf
Speedwell
Sphaeranthus indicus
Spikenard
squawvine
St. John's Wort
Stachytarpheta cayennensis
star of Bethlehem
Storax
Sumbul
sweet flag
Sweet Orange alcohol
Tagara
Tea
Terpenoids
Tetrahydropalmatine
thyme
Tinospora cordifolia
Traveler's Joy
Trichilia catigua
Uncaria
Valerenic acid
Valerian root
velvet bean
Verbena
Vervain
Vetiver
Viburnum
Violet
vitamin B
vitamin B12
vitamin B6
vitamin C
Vitex Agnus-Castus
Vitexin
Waterhyssop
White Tea
Withanolides
Wogonin
Wood betony
Xylaria nigripes
Yerba buena
Ylang ylang
Yohimbine
Yuzu
Zinc

Products containing N-acetyl-cysteine (NAC)

Metagenics AdvaClear
Metagenics AdvaClear
Designs For Health Amino-D-Tox™
Designs For Health Amino-D-Tox™
Pure Encapsulations AntiOxidant Formula
Pure Encapsulations Athletic Nutrients
Metagenics Axis Endo™ Mango
Metagenics Ceralin® Forte
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Chai
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Vanilla
Metagenics Clear Change Daily Essentials
Designs For Health Detox Antiox™
Integrative Therapeutics Detoxication Factors
Integrative Therapeutics Detoxication Factors
Designs For Health Detoxification Support Packets
Pure Encapsulations DIM Detox
Metagenics EstroFactors®
Metagenics GlutaClear®
Designs For Health Hepatatone Plus™
Pure Encapsulations Hist Reset
Pure Encapsulations HM Complex
Pure Encapsulations HM Complex
Metagenics Immune Active
Metagenics Immune Defense Pack
Integrative Therapeutics K-PAX MitoNutrients
Pure Encapsulations Lithium Orotate 5 mg
Pure Encapsulations Lithium Orotate 5 mg
Pure Encapsulations Liver G.I. Detox
Pure Encapsulations LVR Formula
Pure Encapsulations LVR Formula
Pure Encapsulations Macular Support Formula
Pure Encapsulations Macular Support Formula
Designs For Health Metal-X-Synergy™
Metagenics MethylCare
Pure Encapsulations Mitochondria-ATP
Integrative Therapeutics Multiplex-1 No-Iron
Designs For Health N-Acetyl-Cysteine
Integrative Therapeutics NAC
Thorne NAC
Pure Encapsulations NAC+ Glycine Powder
Douglas Laboratories NAC (N-ACETYL CYSTEINE) 600 mg
Douglas Laboratories NAC (N-ACETYL CYSTEINE) 900 mg
Pure Encapsulations NAC (N-Acetyl-l-Cysteine) 600 mg
Pure Encapsulations NAC (n-acetyl-l-cysteine) 600 mg
Pure Encapsulations NAC (N-Acetyl-l-Cysteine) 600 mg
Pure Encapsulations NAC (N-Acetyl-l-Cysteine) 900 mg
Pure Encapsulations NAC (N-Acetyl-l-Cysteine) 900 mg
Pure Encapsulations Nutrient 950® with NAC
Designs For Health OcuForce™
Designs For Health PaleoCleanse Plus™
Designs For Health PaleoCleanse Plus™
Designs For Health PaleoCleanse Plus™ Detox Program
Designs For Health PaleoCleanse Plus™Chocolate Detox Kit
Designs For Health Plant Protein Cleanse
Designs For Health Plant Protein Cleanse Plus™ 570g
Pure Encapsulations Polyphenol Nutrients
Pure Encapsulations Polyphenol Nutrients
Designs For Health Pulmonary Revive™
Pure Encapsulations PureDefense with NAC
Pure Encapsulations PureDefense with NAC
Pure Encapsulations PureGenomics® UltraMultivitamin
Metagenics Renagen™ DTX
Designs For Health S-Acetyl Glutathione Synergy
Metagenics Sinuplex®
Vitabase Super Antioxidant Formula
Pure Encapsulations Th2 Modulator
Metagenics Trancor®
Douglas Laboratories Ultra Preventive
Douglas Laboratories Ultra Preventive
Douglas Laboratories Ultra Preventive ®-EZ Swallow
Douglas Laboratories Ultra Preventive® X
Metagenics UltraClear RENEW Detox Powder Berry
Metagenics UltraClear RENEW Detox Powder Chai
Metagenics UltraClear RENEW Detox Powder Vanilla