GABA 500 mg

GABA 500 mg

Swanson4.7 (4,848 ratings)
Format:Capsule Quantity: 100 Capsule(s) · 100 servings
Goals
$9.99 $0.09 per serving

Product analysis

61 out of 100

GABA 500 mg may help with winding down at a low serving cost, though lasting everyday stress relief remains uncertain.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality20

The GABA preparation is unspecified. Its quality cannot be judged confidently or assumed to match a particular fermented preparation.

Ingredient Transparency63

The GABA amount is disclosed, making serving sizes easy to compare. A more specific preparation is not identified.

Value For Money100

The GABA has a low serving cost. That supports affordability for someone specifically seeking GABA.

Customer Satisfaction89

Customer feedback is very favorable across thousands of ratings. The broad review base supports the satisfaction pattern without proving calming or sleep effects.

Product Focus64

The formula has a narrow calming-related purpose. Short-term task-stress findings offer limited support, while reliable everyday mood and sleep benefits remain unclear.

Format
Capsule
Container
100 Capsule(s)
Per serving
$0.09
Customer rating
4.7 · 4,848 ratings
Report analysis

Goals

Stress Relief
Impact
Highest effect
A+ Ingredient FitC PathwaysA EvidenceA+ Formulation Logic
GABA · 500 mg

GABA has limited short-term task-stress findings, with narrow settings and food preparations limiting generalization to sustained supplement use. The 500 mg serving meets the saved amount criteria. That finding supports a focused calming-related connection without demonstrating durable everyday stress relief.

How this product is rated for Stress Relief

Ingredient fit96

GABA is a key ingredient in the saved stress-related findings. The amount criteria are met.
Goal fit
GABA gives the formula a focused connection to stress-related outcomes, alongside its other linked uses.
Dose adequacy
The credited amounts meet the saved comparison criteria; this does not establish stronger or more lasting stress relief.

Pathways60

The strongest coverage concerns calming-related activity. The breadth finding includes calming-related activity.
Depth
The strongest saved coverage concerns calming-related activity; this does not establish a lasting clinical effect.
Breadth
The routes meeting the breadth criterion are calming-related activity. Other aspects receive less or no coverage.

Evidence91

GABA has limited short-term task-stress findings; narrow settings and preparation differences limit sustained supplement claims.
Evidence strength
GABA has limited short-term task-stress findings; narrow settings and preparation differences limit sustained supplement claims.
Studied preparation
The credited ingredients meet the saved preparation criteria; population, duration and outcome differences still limit expectations.

Formulation logic100

The credited ingredients meet the minimum amount criterion, with no unmet partner requirement or evaluated ingredient conflict identified.
Partner coverage
No credited ingredient has an unmet partner requirement; this does not establish extra relief from combining ingredients.
Conflicts
No ingredient conflict was identified by the evaluated rules.
Effective doses
All credited ingredients meet the saved minimum amount criterion; this is not a proven effective dose or response threshold.
Study evidence
GABA Supportive 6 studies
Sleep Support
Impact
Moderate effect
A+ Ingredient FitF PathwaysD+ EvidenceA+ Formulation Logic

GABA may help with winding down, but its role in sleep remains uncertain and it isn't established as a direct sleep-inducing ingredient. This product has no other active sleep ingredient to add a separate timing or sleep-quality role.

The link between oral GABA and a reliable sleep effect is unclear, so the formula rests on this single calming possibility. Its overall sleep support remains narrow.

How this product is rated for Sleep Support

Ingredient fit96

GABA is the sole sleep-related active, keeping the product focused on a possible calming role.
Goal fit
The single listed active has a possible sleep-related role and no unrelated active dilutes focus.
Dose adequacy
The GABA amount supports its possible role, though sleep contribution remains uncertain.

Pathways12

GABA mainly contributes to calming, without sleep timing or broader route coverage.
Depth
Neural calming is the only route represented by GABA.
Breadth
No sleep route reaches broad coverage.

Evidence51

GABA's sleep-related support remains limited compared with the strongest sleep ingredients.
Evidence strength
GABA's sleep-related role is limited compared with the strongest ingredients.
Studied preparation
GABA is identified and an amount is listed, though its sleep benefit remains uncertain.

Formulation logic100

GABA can contribute on its own, though its sleep effect remains uncertain.
Partner coverage
GABA can contribute on its own, though its sleep effect remains uncertain.
Conflicts
No listed ingredient is identified as working against sleep at bedtime.
Effective doses
The GABA amount is meaningful, but amount alone doesn't establish a sleep effect.
Study evidence
GABA Supportive 4 studies
Mood Support
Impact
Moderate effect
A+ Ingredient FitF PathwaysD+ EvidenceA+ Formulation Logic

Whether isolated oral GABA improves everyday mood is unclear. GABA acts as a calming chemical messenger in the body, but that role alone doesn't tell us how taking it by mouth will affect how you feel. The 500 mg serving also can't be treated as interchangeable with a specific fermented preparation containing GABA.

How this product is rated for Mood Support

Ingredient fit96

GABA is the single declared ingredient relevant here; its role and limits determine the mood expectation. The serving declares GABA 500 mg. These are serving amounts, not an inferred daily regimen.
Goal fit
GABA is the single declared ingredient relevant here; its role and limits determine the mood expectation.
Dose adequacy
The serving declares GABA 500 mg. These are serving amounts, not an inferred daily regimen.

Pathways17

Calming is the main connection; a calming role does not automatically mean lasting mood improvement.
Depth
Calming is the main connection; a calming role does not automatically mean lasting mood improvement.
Breadth
Different biological roles should not be interpreted as separate, additive mood benefits.

Evidence53

An oral GABA mood benefit remains unclear; its messenger role alone cannot predict an effect. The declared ingredient identities are available; their presence alone does not predict how much mood will change.
Evidence strength
An oral GABA mood benefit remains unclear; its messenger role alone cannot predict an effect.
Studied preparation
The declared ingredient identities are available; their presence alone does not predict how much mood will change.

Formulation logic100

The ingredients do not require an additional partner, and no particular conflict is identified. Their combination alone does not predict added benefit.
Partner coverage
No additional ingredient partner is required for the ingredients with an independent role here.
Conflicts
No particular ingredient conflict is identified for this serving.
Effective doses
Declared serving amounts include GABA 500 mg; these comparisons do not establish an effective dose for every reader.
Study evidence
GABA Supportive 12 studies

Ingredients

IngredientAmount per servingScore
GABA
500 mg 85
Adults 18–50
Report overview
GABA · 500 mg OverallScore85
B- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyA+ Value
The label lists 500 mg of generic GABA per serving. The whole-product serving costs about $0.10, a relatively low price for generic GABA under the evaluation.
How this ingredient is rated

Active Ingredient Quality & Bioavailability70

The evaluation identifies generic GABA; the saved facts do not specify its source or production method.
GABA Source & Production Method
The evaluation identifies generic GABA; the saved facts do not specify its source or production method.

Dose, Safety & Label Transparency93

The label lists 500 mg of generic GABA per serving, so the GABA amount is disclosed. The stored Other Ingredients panel matches a flow-agent term in the evaluation.
GABA Dosage Adequacy & Transparency
The label lists 500 mg of generic GABA per serving, so the GABA amount is disclosed.
Label Purity & Excipient Quality
The stored Other Ingredients panel matches a flow-agent term in the evaluation.

Value100

A whole-product serving costs about $0.10, which the evaluation considers relatively low for generic GABA.
Price per Effective Dose
A whole-product serving costs about $0.10, which the evaluation considers relatively low for generic GABA.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Oral intake of γ-aminobutyric acid affects mood and activities of central nervous system during stressed condition induced by mental tasks.
    Yoto A; Murao S; Motoki M; Yokoyama Y; Horie N; Takeshima K; Masuda K; Kim M; Yokogoshi H · Amino acids · 2012
    Randomized trial63 participantsMood Support Stress Relief forGABA
  2. Peripartum neuroactive steroid and γ-aminobutyric acid profiles in women at-risk for postpartum depression.
    Deligiannidis KM; Kroll-Desrosiers AR; Mo S; Nguyen HP; Svenson A; Jaitly N; Hall JE; Barton BA; Rothschild AJ; Shaffer SA · Psychoneuroendocrinology · 2017
    Cohort study56 participantsMood Support forGABA
  3. The role of neurotransmitters in mediating the relationship between brain alterations and depressive symptoms in patients with inflammatory bowel disease.
    Wang J; Liu G; Xu K; Ai K; Huang W; Zhang J · Human brain mapping · 2023
    Case-control study69 participantsMood Support forGABA
  4. Occipital gamma-aminobutyric acid and glutamate-glutamine alterations in major depressive disorder: An mrs study and meta-analysis.
    Truong V; Cheng PZ; Lee HC; Lane TJ; Hsu TY; Duncan NW · Psychiatry research. Neuroimaging · 2021
    Observational studyMood Support forGABA
  5. Systematic review of gamma-aminobutyric-acid inhibitory deficits across the reproductive life cycle.
    Vigod SN; Strasburg K; Daskalakis ZJ; Blumberger DM · Archives of women's mental health · 2014
    Systematic review11 studies pooledMood Support forGABA
  6. Safety and Efficacy of Gamma-Aminobutyric Acid from Fermented Rice Germ in Patients with Insomnia Symptoms: A Randomized, Double-Blind Trial.
    Byun JI; Shin YY; Chung SE; Shin WC · Journal of clinical neurology (Seoul, Korea) · 2020
    Randomized trial40 participantsSleep Support forGABA
  7. Analysis of the Effects of Known Sleep-Support Supplements in Relation to Life Habits, Sleep Conditions, and Sleep Problems.
    Imafuku F; Yamamoto K; Tanaka E; Aoki R; Nishino S · Nutrients · 2023
    Randomized trial160 participantsSleep Support forGABA
  8. Reduced γ-aminobutyric acid in occipital and anterior cingulate cortices in primary insomnia: a link to major depressive disorder?
    Plante DT; Jensen JE; Schoerning L; Winkelman JW · Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2012
    Case-control study40 participantsSleep Support forGABA
  9. GABA Supplementation, Increased Heart-Rate Variability, Emotional Response, Sleep Efficiency and Reduced Depression in Sedentary Overweight Women Undergoing Physical Exercise: Placebo-Controlled, Randomized Clinical Trial.
    Guimarães AP; Seidel H; Pires LVM; Trindade CO; Baleeiro RDS; Souza PM; Silva FGDE; Coelho DB; Becker LK; Oliveira EC · Journal of dietary supplements · 2024
    Randomized trial30 participantsSleep Support Stress Relief forGABA
  10. Relieving occupational fatigue by consumption of a beverage containing γ-amino butyric acid.
    Kanehira T; Nakamura Y; Nakamura K; Horie K; Horie N; Furugori K; Sauchi Y; Yokogoshi H · Journal of nutritional science and vitaminology · 2011
    Clinical trial30 participantsStress Relief forGABA
  11. Cortical gamma-aminobutyric acid and glutamate in posttraumatic stress disorder and their relationships to self-reported sleep quality.
    Meyerhoff DJ; Mon A; Metzler T; Neylan TC · Sleep · 2014
    Case-control study45 participantsStress Relief forGABA
  12. Comparison of the effects of two amino acids, Gamma-aminobutyric acid (GABA) and L-theanine, on sedation, anxiety, and cognition in preoperative surgical patients - A randomized controlled study.
    Deshpande SS; Kurdi M; Baiju A; Athira AS; Sarasamma AG; Gangadharan AK · Journal of anaesthesiology, clinical pharmacology · 2025
    Randomized trial168 participantsStress Relief forGABA