Best GABA Supplements 2026: Cost per Effective Dose
Top pick for GABA: Nutricost GABA 750 mg — 750mg GABA per 1 capsule, Third-party tested (brand claim), $0.08/day.
All GABA Supplements Compared
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | Pick | Buy |
|---|---|---|---|---|---|---|
| Nutricost GABA 750 mg | Nutricost | 750mg GABA / 1 capsule | $0.08 | Third-party tested (brand claim) | Buy | |
| NOW GABA 500 mg | NOW Foods | 500mg GABA / 1 capsule | $0.09 | cGMP | Buy | |
| NOW Foods GABA 750 mg | NOW Foods | 750mg GABA / 1 capsule | $0.10 | cGMP | Buy | |
| Source Naturals Serene Science GABA 750 mg | Source Naturals | 750mg GABA / 1 capsule | $0.12 | cGMP | Buy | |
| Thorne PharmaGABA-100 | Thorne | 100mg GABA / 1 capsule | $0.57 | NSF Certified for Sport | Buy | |
| Jarrow Formulas GABA Soothe | Jarrow Formulas | 100mg GABA (+ L-theanine + ashwagandha, combo) / 1 capsule | $0.58 | cGMP | Buy |
Registry check · GABA
Does anyone independently verify GABA supplements?
1 of the 6 GABA products on this page is confirmed in NSF/ANSI 173: Thorne PharmaGABA-100. For the others, the listing may name a certification, but we did not find it in a public registry — that is not evidence against them, only an absence of independent confirmation.
Certification is not a dosing guarantee. Across the whole catalogue, certified products reach the clinically studied dose 57% of the time and uncertified ones 71% — a gap too small to mean anything (Fisher p = 0.185). Read the GABA dose column either way.
The 6 products on this page checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What GABA labels show
Priced per day, these GABA products run $0.08 to $0.58 — a 7.2× gap between the cheapest and dearest GABA here, across 5 brands.
In-Depth GABA Guides
Go deeper on GABA — by goal, by form, and what the evidence actually supports:
Our Picks
Lowest Cost: Nutricost GABA 750 mg
750mg GABA per 1 capsule. Third-party tested (brand claim). $0.08/day. 240 servings per container at $19.95.
The shelf · GABA
These GABA servings are not comparable to each other
Thorne PharmaGABA-100 states 100 mg a serving and Source Naturals Serene Science GABA 750 mg states 750 mg, both occupy one row of the same price column. Nutricost GABA 750 mg is the lowest here at $0.08 a day, and its serving (750 mg) is not smaller than most, so its low price is not down to a small serving. Before comparing Nutricost GABA 750 mg with Jarrow Formulas GABA Soothe, check what each calls a serving.
Method: the 6 GABA products above, compared on label facts, serving size, servings per container, form, price. Not a dosing recommendation.
How these 6 GABA products were ranked
1 of these 6 is confirmed in a certifier's registry — the only GABA row where the claim is independently backed — and the rest are ranked on cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever GABA you buy. Full methodology.