This product provides 500 mg of **GABA** (Gamma-Aminobutyric Acid) per serving in a pure powder format with no other ingredients. GABA is your brain's main calming neurotransmitter — it slows down nerve activity, which is why it's associated with relaxation and sleep. At 500 mg per serving with 2-3 daily servings recommended, this delivers a generous dose well above the commonly supplemented range of 100-300 mg.

The honest caveat: whether supplemental GABA actually crosses your blood-brain barrier is still debated among researchers. Some evidence suggests it may work indirectly through your gut's nervous system via the vagus nerve, rather than reaching the brain directly. The clinical trial data is mixed — a few small studies show modest benefits for stress reduction and sleep onset, but there are no large-scale meta-analyses confirming these effects. The evidence level remains low compared to better-studied calming compounds like magnesium or L-theanine.

The powder format gives you flexibility to adjust your dose, and taking it on an empty stomach as directed may improve absorption. If you're exploring natural options for relaxation support, this is a straightforward formulation with nothing else added — but keep your expectations grounded in the current science.

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BioStacks

NOW

GABA Pure Powder

Powder · 340 servings · $0.04/serving

45 / 100Average

Supports

Score Breakdown

Formulation
45
Safety
100
Final score
45/100

Ingredients (1)

Gamma-Aminobutyric Acid500 mg

Within effective range

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Gamma-Aminobutyric Acid500 mg

Other Ingredients

Fillers, coatings, and additives

No other ingredients listed

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.