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GABA 500 mg

Solgar
4.8
★ ★ ★ ★ ★
(446 ratings)
GABA 500 mg
Product Image
Score82
A focused standard GABA product delivering 500 mg in a single capsule. The source and fermentation method are not disclosed.
How scoring works
Quantity:50 Capsule(s) • (50 servings)
Goals:
Stress Relief
Sleep Support
Mood Support

Score 82

A focused standard GABA product delivering 500 mg in a single capsule. The source and fermentation method are not disclosed.
How scoring works

Also available as

1 option
100 servings GABA 500 mg • 100 Capsule(s) • 100 servings $18.69 ($0.18 per serving)
$11.84($0.23 per serving)
Daily Vita
$ 13.03
iHerb
$ 11.84
Vitacost
$ 11.99
Report prices

Analysis

The single capsule supplies 500 mg of standard GABA. The formula also has a focused single-ingredient design.

The amount falls in a practical standalone range for trying relaxation or bedtime support. Oral GABA response varies, so a clear dose is more useful than assuming the ingredient will affect everyone in the same way.

The main limitation is that the source and fermentation method are not disclosed. The product fits adults seeking a moderate standalone capsule, provided sedative stacking and next-day drowsiness are considered.

Who is it for
  • adults seeking a moderate standalone capsule
  • people seeking focused relaxation support without a multi-herb blend
Best for
  • evening relaxation
  • supporting a calmer bedtime routine

Pros

  • Clearly states 500 mg of GABA
  • Single capsule is easy to use
  • A focused single-ingredient design

Cons

  • The source and fermentation method are not disclosed
  • Oral GABA effects may differ substantially between users
  • Focused formula does not address broader causes of poor sleep or stress

Warnings

  • GABA may cause drowsiness, dizziness, or reduced alertness.
  • Alcohol, sleep medicines, benzodiazepines, antihistamines, or other sedatives may intensify drowsiness when combined with GABA.

Nutrient quality

84 Highest impact

The vegetable capsule is practical, but the generic GABA source lacks fermentation details. The GABA amount provides substantial standalone depth, and the single active directly targets relaxation but covers only one pathway.

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Ingredient transparency

79 High impact

Every listed active has a specific amount and no proprietary blend obscures the formula. Complete intake directions and inactive ingredients are not supplied, leaving part of the label unverified.

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Customer satisfaction

71 High impact

The supplied aggregate satisfaction level is exceptionally strong. The moderate feedback volume offers a useful but not definitive aggregate.

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Value for money

91 Highest impact

The substantial amount supports the modest cost. The serving provides strong value, and the product compares well among standard GABA capsules.

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Report analysis

Goals

Stress Relief
Stress Relief
Impact
High effect
B- Goal FitA- Strength of SupportC CoverageA Formula Quality
GABA · 500 mg

GABA has a direct calming rationale as the body's main inhibitory neurotransmitter, and the amount is meaningful for standalone use. Oral GABA's ability to reach the brain remains uncertain, so individual effects may vary.

The formula is fully focused and clearly disclosed, but it uses an unbranded source without a fermented-quality signal. It supports one narrow calming mechanism rather than broader stress resilience.

Study evidence
GABA Supportive 6 studies
Sleep Support
Sleep Support
Impact
High effect
D+ Goal FitA Strength of SupportC- CoverageA Formula Quality

GABA at 500 mg supplies a clearly disclosed amount aimed at nervous-system relaxation. Oral GABA has uncertain entry into the brain, so evidence for improving sleep remains limited.

The capsule keeps the formula simple and gives one pathway meaningful depth. Circadian timing, mineral support, and other sleep mechanisms are not addressed.

Study evidence
GABA Supportive 4 studies
Mood Support
Mood Support
Impact
High effect
D Goal FitB Strength of SupportD- CoverageA+ Formula Quality

Oral GABA may promote a calmer state, but its ability to influence persistent mood is uncertain. Evidence is limited by uncertain brain entry and does not establish a dependable mood-stabilizing effect.

The 500 mg amount is clearly disclosed and fits standalone calming use. GABA may add to drowsiness from alcohol, sleep aids, or other sedating medicines.

Study evidence
GABA Supportive 12 studies

Ingredients

IngredientAmount per serving
GABA
500 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free Vegetarian
Report overview
GABA · 500 mg OverallScore84
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB- Value

The clearly disclosed GABA amount falls within the preferred standalone range. A vegetable capsule offers practical delivery, though the unbranded GABA source lacks the quality signal of fermented PharmaGABA. Cost per effective serving is favorable.

View ingredientView products
Loading alternative details
74 Performance

Liposomal GABA

Quicksilver Scientific
<p>240 mg GABA with 100 mg L-theanine and phosphatidylcholine broadens the original's single-ingredient approach and may better support relaxation through complementary pathways. The supplied data do not establish how much the liposomal delivery changes absorption, and the serving cost is high.</p>
85 Performance

Pharma GABA 250 mg

Natural Factors Stress-Relax
<p>250 mg fermented branded GABA provides clearer source definition than the original's generic GABA. The branded source improves ingredient definition, although oral GABA effects can vary and drowsiness remains possible.</p>
84 Performance

GABA 500 mg

NOW
<p>500 mg GABA with 2 mg vitamin B6 adds a small relevant vitamin cofactor while retaining the original's GABA amount. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.</p>
84 Budget

GABA

NOW
<p>Lower serving cost and 500 mg GABA make this a more economical option for the same GABA-focused sleep and stress goals. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.</p>
81 Budget

GABA 750 mg

Source Naturals Serene Science
<p>Lower serving cost and 750 mg GABA make this a more economical option for the same GABA-focused sleep and stress goals. Generic sourcing and uncertain oral brain availability limit confidence, while the high amount may increase drowsiness.</p>
83 Budget

GABA 500 mg

Nutricost
<p>Lower serving cost and 500 mg GABA with 2 mg vitamin B6 make this a more economical option for the same GABA-focused sleep and stress goals. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.</p>
83 Value

GABA 500 mg

NOW
<p>Lower serving cost paired with 500 mg GABA with 2 mg vitamin B6 creates a stronger balance of focused calming support and value than the original. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.</p>
83 Value

GABA 500 mg

Swanson
<p>Lower serving cost paired with 500 mg GABA creates a stronger balance of focused calming support and value than the original. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.</p>
81 Value

GABA Powder

Source Naturals Serene Science
<p>Lower serving cost paired with 750 mg GABA creates a stronger balance of focused calming support and value than the original. Generic sourcing and uncertain oral brain availability limit confidence, while the high amount may increase drowsiness.</p>
Report alternatives

Sources

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

  1. 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
  2. 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
  3. 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 participantsStress Relief Mood Support forGABA
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  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