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GABA 750 mg

Source Naturals Serene Science
4.5
★ ★ ★ ★ ★
(4049 ratings)
GABA 750 mg
Product Image
Score81
The clearly disclosed 750 mg serving is focused and practical, though ordinary oral GABA has inconsistent real-world effects.
How scoring works
Quantity:180 Capsule(s) • (180 servings)
Goals:
Stress Relief
Sleep Support
Mood Support

Score 81

The clearly disclosed 750 mg serving is focused and practical, though ordinary oral GABA has inconsistent real-world effects.
How scoring works
$22.05($0.12 per serving)
iHerb
$ 22.05
Pure Formulas
$ 22.05
Amazon
$ 22.05
Vitacost
$ 22.05
Report prices

Analysis

750 mg sits within a practical standalone range for a product aimed at relaxation, stress, or sleep support. Oral GABA targets an inhibitory pathway, but its ability to reach the brain reliably remains uncertain.

Capsule delivery is simple and provides a fixed serving. The single-active design is easy to assess and avoids unrelated ingredients.

The supply and serving cost provide good practical value. The formula is better suited to situational calming than to broad mood support or circadian sleep timing.

Who is it for
  • Adults seeking a simple calming supplement
  • Users who prefer capsule delivery
Best for
  • Situational relaxation support
  • A focused single-pathway formula

Pros

  • Clearly disclosed 750 mg amount
  • Focused active-ingredient list
  • Large one-hundred-eighty-serving supply

Cons

  • Ordinary oral GABA has uncertain brain delivery
  • No branded fermented source
  • Does not address circadian timing

Warnings

  • GABA may cause drowsiness; do not drive or operate machinery until its effects are known.
  • Alcohol, sleep medicines, sedating antihistamines, and other sedatives may intensify impaired alertness.
  • GABA may lower blood pressure in some users; monitor for dizziness when using blood-pressure medicine.

Nutrient quality

78 High impact

Conventional oral delivery does not overcome the main uncertainty about how much ordinary GABA reaches the brain. upper-range falls within a practical standalone range.

Ingredient transparency

81 Highest impact

The GABA amount is clearly disclosed. Excipients and daily directions are absent from the supplied data, which leaves some label details uncertain.

Customer satisfaction

69 High impact

The aggregate satisfaction average is favorable, though no detailed feedback is supplied. The large volume provides a stable aggregate satisfaction signal.

Value for money

95 Highest impact

A clear, practical amount supports good formula value despite generic sourcing. The serving cost is low for the disclosed amount.

Report analysis

Goals

Stress Relief
Stress Relief
Impact
High effect
C+ Goal FitA Strength of SupportC+ CoverageA+ Formula Quality
GABA · 750 mg

The clearly disclosed 750 mg GABA amount targets inhibitory nervous-system signaling and may support relaxation during acute stress. Evidence for standard oral GABA remains limited because delivery to the brain and effects on perceived stress are uncertain.

The capsule provides a substantial single-active serving without token companions. GABA can cause drowsiness, and combining it with alcohol or sedative medicines may intensify impaired alertness.

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

The fully disclosed GABA amount may help nervous-system relaxation before bed and sits within the preferred range. A capsule is convenient for a fixed nightly serving.

Ordinary oral GABA has less consistent sleep evidence than melatonin or magnesium, and no premium fermented source is identified. The formula is focused but addresses only one part of sleep support.

Study evidence
GABA Supportive 4 studies
Mood Support
Mood Support
Impact
Moderate effect
F Goal FitB+ Strength of SupportF CoverageA+ Formula Quality

GABA has a clear calming role inside the brain, but oral GABA crosses the blood-brain barrier poorly. Any mood effect may therefore be modest or mediated outside the central nervous system.

The 750 mg amount is substantial and fully disclosed. The focused formula avoids padding but does not address serotonin, stress adaptation, or neuroinflammation.

Study evidence
GABA Supportive 12 studies

Ingredients

IngredientAmount per serving
GABA
750 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free
Report overview
GABA · 750 mg OverallScore90
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The capsule supplies a fully disclosed GABA amount at the upper end of the preferred range. Its standard unbranded source offers less quality assurance than fermented PharmaGABA, while the capsule remains a practical delivery format. Low cost per full-dose serving supports strong value.

View ingredientView products
Loading alternative details
85 Performance

Pharma GABA 250 mg

Natural Factors Stress-Relax
<p>A meaningful amount of fermented branded GABA provides well-defined, focused relaxation support. Compared with the original, the fermented branded source provides clearer source definition; the defined source improves quality confidence, although individual response to oral GABA may still vary.</p>
79 Performance

PharmaGABA Chewables

Designs for Health
<p>Branded fermented GABA and a well-targeted amount provide focused relaxation support. Compared with the original, the fermented branded source provides clearer source definition; the defined source improves quality confidence, although individual response to oral GABA may still vary.</p>
77 Performance

Liposomal GABA

Quicksilver Scientific
<p>Liposomal delivery plus L-theanine creates a technically strong and coherent calming formula. Compared with the original, liposomal delivery and L-theanine provide a broader calming design; the supplied feedback and high serving cost still weaken value confidence.</p>
86 Budget

GABA

NOW
<p>A substantial GABA amount in flexible liquid form provides highly economical relaxation support. The lower serving cost improves value compared with the original; its lower amount may suit someone seeking a gentler serving, while ordinary oral GABA still has uncertain brain availability.</p>
81 Budget

GABA 750 mg

Source Naturals Serene Science
<p>A clearly disclosed upper-range GABA amount provides focused calming support in a simple formula, but ordinary oral GABA has uncertain access to the brain and human effects vary. The lower serving cost improves value compared with the original; its comparable disclosed amount preserves the same basic intensity, while ordinary oral GABA still has uncertain brain availability.</p>
83 Budget

GABA 500 mg

Nutricost
<p>A clearly disclosed well-centered GABA amount provides focused calming support in a simple formula, but ordinary oral GABA has uncertain access to the brain and human effects vary. The lower serving cost improves value compared with the original; its lower amount may suit someone seeking a gentler serving, while ordinary oral GABA still has uncertain brain availability.</p>
89 Value

GABA Powder

Source Naturals Serene Science
<p>The combination of a flexible 750 mg GABA serving and an economical serving creates better practical value than the original. The larger amount may cause drowsiness, especially alongside alcohol or other sedating products.</p>
88 Value

GABA 500 mg

Swanson
<p>The combination of clearly disclosed 500 mg GABA and an economical serving creates better practical value than the original. Ordinary oral GABA has uncertain access to the brain, so individual effects may vary.</p>
87 Value

GABA 750 mg

NOW
<p>The combination of clearly disclosed 750 mg GABA and an economical serving creates better practical value than the original. The larger amount may cause drowsiness, especially alongside alcohol or other sedating products.</p>
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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. 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 participantsStress Relief Sleep 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. The impact of matching for reproductive status on the comparison of magnetic spectroscopic measurements of glutamate and gamma-aminobutyric acid + in the medial prefrontal cortex of women with major depression.
    Tran KH; Luki J; Hanstock S; Hanstock CC; Seres P; Aitchison K; Shandro T; Le Melledo JM · Journal of affective disorders · 2024
    Case-control study48 participantsMood Support forGABA
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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