Alpha Brain
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Alpha Brain falls short.
Onnit's US nootropic stack, backed by two clinical studies. Good mainstream trust, but proprietary blends limit transparency.
What it does
Alpha Brain is Onnit's flagship nootropic product, first released in 2011 and popularised through Joe Rogan's podcast endorsements. It is one of only two nootropic supplements with published clinical trial data on its specific formula. It is National Sanitation Foundation (NSF) Certified for Sport, making it suitable for drug-tested athletes.
How it works
Alpha Brain uses three proprietary blends -- Onnit Flow Blend, Focus Blend, and Fuel Blend -- containing cholinergics (Alpha-GPC), adaptogens (Bacopa), and amino acids (Tyrosine, Theanine). The label states each blend's total and two individual amounts (Bacopa 100mg, Huperzine A 400mcg): Bacopa, Alpha-GPC (at most 140mg) and L-Tyrosine (at most 650mg) fall short of their clinical doses, and the other blend members cannot be checked individually. The two published studies (Onnit-funded, 2016 and 2021) tested the full formula and showed statistically significant improvements in verbal memory and executive function versus placebo.
What to expect
Day one: subtle focus improvement, particularly noticeable for users who haven't taken cholinergic supplements before. The lack of caffeine means no energy spike -- effects are gentle. At 4-6 weeks: most users report consistent mild improvements in word retrieval and task focus. Onnit's 30-day money-back guarantee covers the first purchase of each product made directly on Onnit.com.
Hero ingredients
- L-TheanineNot stated (share of 650mg blend)
- Huperzine A400mcg
- Vitamin B610mg
- Alpha-GPCNot stated; at most 140mg (240mg blend incl. 100mg Bacopa)
- PhosphatidylserineNot stated (share of 650mg blend)
Who it's for
- Two published clinical studies
- Highest US brand recognition
- Only 2 capsules
Who should skip
- Proprietary blends hide doses
- No EU storefront
- Subscription cancellation issues
Dosing audit
| Ingredient | Label | Clinical | Status |
|---|---|---|---|
| Bacopa Monnieri (Focus Blend) | 100mg | 300-450mg/day (55% bacosides) | ✕ Under |
| Alpha-GPC (Focus Blend) | Not stated; at most 140mg (240mg blend incl. 100mg Bacopa) | 300-600mg/day | ✕ Under |
| Huperzine A (Toothed Clubmoss, Focus Blend) | 400mcg | 100-200mcg/day | ✓ Pass |
| L-Tyrosine (Flow Blend) | Not stated; at most 650mg (blend total) | 2000mg/day (lowest positive trial) | ✕ Under |
| L-Theanine (Flow Blend) | Not stated (share of 650mg blend) | 100-200mg/day | ? Unverified |
| Phosphatidylserine (Flow Blend) | Not stated (share of 650mg blend) | 100-300mg/day | ? Unverified |
| Oat Straw Extract (Flow Blend) | Not stated (share of 650mg blend) | 430-1600mg/day | ? Unverified |
| Cat's Claw Bark Extract | 350mg | No reference dose on file | ? Unverified |
| Vitamin B6 (Pyridoxine HCl) | 10mg | No reference dose on file | ? Unverified |
| L-Leucine + Pterostilbene (Fuel Blend) | 60mg (blend total) | No reference dose on file | ? Unverified |
Ingredient quality
Number and quality of evidence-graded ingredients. Trademarked extracts and standardized actives raise this score.
Dosing vs. clinical evidence
The share of ingredients with a reference dose on our ingredient pages whose label-stated daily amount meets that page's minimum. Amounts the label hides (blend shares) or states on a different basis count as not met; ingredients with no reference page are listed but not scored.
Formula transparency
Full disclosure of every ingredient at its exact dose. Proprietary blends are scored as opaque.
Value for money
Cost per month relative to per-serving clinical doses delivered. Cheaper products with underdoses score lower.
Brand trust
Brand reputation, third-party testing, refund track record, and Trustpilot signal across multiple years.
How the score is computed
Each pillar is weighted by editorial importance. Weights are constant across every brand we audit — they're not adjusted to favour any particular product.
- Ingredient quality25%
- Dosing vs. clinical evidence30%
- Formula transparency20%
- Value for money15%
- Brand trust10%
15,776 verified reviews
We don't embed cherry-picked quotes here. Trustpilot is the canonical source — the score above feeds into our Trust pillar.
Read all 15,776 reviews on Trustpilot →What the vendor’s site says
Quoted word for word from the vendor’s own pages. Terms change, so check them before you buy.
Shipping
Free shipping is available on orders with a subtotal of $100 USD or more (after any discounts are applied).
Per help.onnit.com (opens in new tab), checked
Cancelling a subscription
You may cancel or modify your Onnit subscriptions at any time by visiting your Account Dashboard .
Per onnit.com (opens in new tab), checked
One-time purchase price
ONE-TIME PURCHASE Standard Shipping Rates Apply $79.95
Per onnit.com (opens in new tab), checked
Our affiliate cookie
We earn a commission if you buy through links on this page, at no extra cost to you. Our scores and rankings follow our published methodology; commissions do not influence them.
Buying in the United States
- Local price
- $79/month
Formula per the Supplement Facts on the product page (https://www.onnit.com/products/alpha-brain-90-ct, checked 2026-10-08): per 2 capsules, Vitamin B6 10mg; Onnit Flow Blend 650mg (L-Tyrosine, L-Theanine, Oat straw extract, Phosphatidylserine); Cat's Claw bark extract 350mg; Onnit Focus Blend 240mg (Alpha-GPC, Bacopa extract 100mg, Toothed Clubmoss extract providing Huperzine A 400mcg); Onnit Fuel Blend 60mg (L-Leucine, Pterostilbene). Reference doses are this site's ingredient pages.
Onnit's money-back guarantee is 30 days, for the first purchase of each product bought directly on Onnit.com, refunding the product cost but not shipping (https://help.onnit.com/en-US/30-day-money-back-guarantee-6327406, checked 2026-10-08).
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Health disclaimer
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Information on this page is for educational purposes only and is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you are pregnant, nursing, taking medication, or have a medical condition. Individual results vary.