GABA 500 mg Unflavored

GABA 500 mg Unflavored

Nutricost4.7 (442 ratings)
Format:Powder Quantity: 500 Gram(s) · 1000 servings
Goals
$21.95 $0.02 per serving
iHerb$21.95

Product analysis

60 out of 100

GABA 500 mg Unflavored is an inexpensive powder that may help with short-term responses to stress. Its effect on sleep remains uncertain.

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

Nutrient Quality20

The precise ingredient form is unspecified, limiting comparisons of quality and absorption. That uncertainty does not establish poor quality.

Ingredient Transparency63

Ingredient amounts are stated, but the precise forms are unspecified. You can compare serving quantities more easily than the ingredient preparations.

Value For Money100

The low cost per serving makes the powder economical. Whether it is worthwhile depends on how useful its limited calming effects are for you.

Customer Satisfaction76

Customer feedback is very positive. Several hundred ratings provide a useful picture, though reviews do not establish effectiveness.

Product Focus70

A single ingredient focuses on calming support for stress and sleep. Evidence is more suggestive for brief stress responses than for reliably better sleep.

Format
Powder
Container
500 Gram(s)
Per serving
$0.02
Customer rating
4.7 · 442 ratings
Report analysis

Goals

Stress Relief
Stress Relief
Impact
Highest effect
A+ Ingredient FitC PathwaysA EvidenceA+ Formulation Logic
GABA · 500 mg
Study evidence
GABA Supportive 6 studies
Sleep Support
Sleep Support
Impact
Moderate effect
A+ Ingredient FitF PathwaysD+ EvidenceA+ Formulation Logic
Study evidence
GABA Supportive 4 studies

Ingredients

IngredientAmount per servingScore
GABA
500 mg 88
Gluten Free Adults 18–50
Report overview
GABA · 500 mg OverallScore88
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
View ingredientView products
74 Performance

Liposomal GABA

Quicksilver Scientific

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.

85 Performance

Pharma GABA 250 mg

Natural Factors Stress-Relax

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.

84 Performance

GABA 500 mg

NOW

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.

84 Budget

GABA

NOW

The eligible pool does not provide three lower-cost choices, so 500 mg GABA is a near-cost fallback rather than a true saving. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.

81 Budget

GABA 750 mg

Source Naturals Serene Science

The eligible pool does not provide three lower-cost choices, so 750 mg GABA is a near-cost fallback rather than a true saving. Generic sourcing and uncertain oral brain availability limit confidence, while the high amount may increase drowsiness.

83 Budget

GABA 500 mg

Nutricost

The eligible pool does not provide three lower-cost choices, so 500 mg GABA with 2 mg vitamin B6 is a near-cost fallback rather than a true saving. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.

83 Value

GABA 500 mg

NOW

500 mg GABA with 2 mg vitamin B6 offers a practical formula-and-cost balance, although it is not cheaper than the unusually economical original. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.

83 Value

GABA 500 mg

Swanson

500 mg GABA offers a practical formula-and-cost balance, although it is not cheaper than the unusually economical original. Generic sourcing and uncertain oral brain availability limit confidence, and drowsiness remains possible.

81 Value

GABA Powder

Source Naturals Serene Science

750 mg GABA offers a practical formula-and-cost balance, although it is not cheaper than the unusually economical original. Generic sourcing and uncertain oral brain availability limit confidence, while the high amount may increase drowsiness.

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. 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
  3. 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
  4. 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
  5. 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 forGABA
  6. 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
  7. 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
  8. 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