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GABA 750 mg

Source Naturals
4.6
★ ★ ★ ★ ★
(11 ratings)
GABA 750 mg
Product Image
Score77
A focused standard GABA product delivering 750 mg in a single tablet. No fermented source or other quality marker is provided.
How scoring works
Quantity:45 Tablet(s) • (45 servings)
Goals:
Stress Relief
Sleep Support

Score 77

A focused standard GABA product delivering 750 mg in a single tablet. No fermented source or other quality marker is provided.
How scoring works
$8.21($0.18 per serving)
Walmart
$ 8.21
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Analysis

The single tablet supplies 750 mg of standard GABA. The formula also has a short single-ingredient formula.

The upper-range amount may suit people who already know they respond to GABA. It is less appropriate as a first trial because stronger drowsiness can make daytime use or dose adjustment difficult.

The main limitation is that no fermented source or other quality marker is provided. The product fits adults who prefer a high-strength tablet, provided sedative stacking and next-day drowsiness are considered.

Who is it for
  • adults who prefer a high-strength tablet
  • people seeking focused relaxation support without a multi-herb blend
Best for
  • evening relaxation
  • supporting a calmer bedtime routine

Pros

  • Clearly states 750 mg of GABA
  • Single tablet is easy to use
  • A short single-ingredient formula

Cons

  • No fermented source or other quality marker is provided
  • Higher fixed amount offers limited titration flexibility
  • 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.
  • Avoid driving or operating machinery until the response to the 750 mg amount is known.

Nutrient quality

80 Highest impact

The hard tablet is conventional and the generic GABA source lacks fermentation details. The GABA amount reaches the high end of the common standalone range, and the high single-active amount provides depth within one calming 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

55 Moderate impact

The supplied aggregate satisfaction level is strong. The very small feedback volume makes the aggregate uncertain.

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Value for money

93 Highest impact

The high dose supports the low cost despite basic form quality. The serving offers strong value, and the product is cost-competitive but less compelling on delivery and feedback.

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Report analysis

Goals

Stress Relief
Stress Relief
Impact
Highest effect
B+ Goal FitB+ Strength of SupportC- CoverageA+ Formula Quality
GABA · 750 mg

A high GABA amount directly targets inhibitory signaling associated with calm. Ordinary oral GABA has mixed human evidence because its central nervous-system availability is uncertain.

The exact amount is clear, but the source is unbranded and the hard tablet offers no delivery advantage. The product is focused and potent within one pathway but provides no adaptogen or foundational mineral support.

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

A high GABA amount provides focused support for inhibitory nervous-system signaling and relaxation. The active amount is clearly stated.

Oral GABA may help some users feel calmer, but human sleep evidence remains inconsistent. The unbranded hard tablet offers no premium source or delivery advantage.

Study evidence
GABA Supportive 4 studies

Ingredients

IngredientAmount per serving
GABA
750 mg
Gluten Free Adults 18–50 Sugar Free Vegetarian
Report overview
GABA · 750 mg OverallScore74
C+ Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyB- Value

The clearly disclosed GABA dose reaches the upper end of the preferred range. Its unbranded source and hard-pressed tablet are conventional rather than premium. A low serving cost makes the potent dose a good value, although the full excipient profile is unavailable.

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 provides a more conservative amount than the original, which may suit users who are sensitive to drowsiness. 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>
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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 participantsStress Relief forGABA
  2. 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
  3. 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
  4. 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
  5. 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
  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