The Independent US Guide to Cognitive Supplements

An 11-ingredient nootropic stack. Every dose is disclosed and the ingredients are backed by peer-reviewed evidence, though only citicoline, phosphatidylserine and L-theanine meet our reference doses. Our editor's choice for overall cognitive support.

Strong formula anchored by Lutemax 2020. $64.99 for a 30-serving bottle on noocube.com. Note: the noocube.com Trustpilot profile has no reviews yet -- verify independently before purchasing.

31 active ingredients -- the most of any single formula in this review. Best for experienced biohackers. Not recommended for EU buyers (no EU storefront).

Onnit's US nootropic stack, backed by two clinical studies. Good mainstream trust, but proprietary blends limit transparency.

4 personalised formula blends per month -- rotate until you find what works. Best for people who want to experiment. Ships from the US; the brand publishes no shipping-country list (its refund policy refers to orders outside the US) — confirm delivery to your address at checkout (checked 2026-09-30).

Single-ingredient Lion's Mane (500mg fruiting-body extract per capsule). ISO in-house lab publishes CoA per batch. Best for buyers who want one ingredient with per-batch lab documentation; one 500mg capsule is half the 1,000mg low end of our Lion's Mane reference dose (the label suggests 1-2 capsules).

NatureBell Ginkgo + Ginseng is the most affordable nootropic in this review at approximately $5 USD/month for a 5-month supply (300 capsules for ~$25). Chinese-manufactured with US branding, available on Amazon with Prime shipping. Combines Ginkgo Biloba (clinically dosed: a 500mg extract standardised to 120mg flavone glycosides) with Panax Ginseng — a TCM-inspired pairing for cerebral blood flow and cognitive energy. Best as a budget entry point or stack addition.

A 20-ingredient fully-disclosed open-label nootropic from Roar Ambition (UK). Citicoline, L-Theanine, phosphatidylserine and caffeine meet this site's reference doses; Lion's Mane, ALCAR, L-Tyrosine, Ginkgo, Rhodiola and Pine Bark are below them. Premium positioning for ambitious professionals 30+; the 6-capsule serving and $90 single-bottle price are the main barriers.

A doctor-formulated brain-and-memory stack from Dr. Daniel Amen's BrainMD line. Two of the four headline ingredients (PS, Huperzine A) meet our reference doses; ALCAR, at 665mg, is below the 1.5–3g/day used in its positive trials, and Ginkgo, at 120mg, is half the 240mg reference dose. Positioned for older adults and patients in the Amen Clinics ecosystem.

The only major nootropic in liquid-shot format. Co-founded by UCLA-trained neuroscientist Dr. Andrew Hill. Every dose is printed on the label, but the 2.6/5 Trustpilot score and aggressive autoship complaints are a real concern — read the cancellation terms before subscribing.

A low-dose caffeine capsule from Performance Lab: 50mg natural caffeine with 100mg L-theanine (a 2:1 ratio), 250mg L-tyrosine and four B-vitamins, with every dose on the label. It is a narrow energy-and-focus formula rather than a full nootropic stack, and one capsule sits below the caffeine and tyrosine ranges in our dosing audit; the label suggests 1-2 capsules.

A low-caffeine pre-workout drink powder from Performance Lab. One 13g scoop gives 80mg natural caffeine, 160mg L-theanine and 400mg L-tyrosine (only L-theanine meets our reference dose; caffeine's is 100mg and L-tyrosine's 2,000mg), plus a 2,200mg Setria for Sport blend (L-citrulline and glutathione, split not disclosed) and 1,500mg red beet powder that are unlikely to reach the doses used in performance trials. US orders ship from New Jersey (per performancelab.com's shipping page, checked 2026-10-05).

A caffeine-free 'cellular energy' capsule from Performance Lab: one 2-capsule serving gives 500mg acetyl-L-carnitine, 100mg R-lipoic acid, 100mg CoQ10, 10mg PQQ and 60mg magnesium, with every dose on the label. It is an energy supplement with a modest cognitive angle, not a nootropic stack: in our dosing audit, acetyl-L-carnitine is below its reference dose and the other four actives have none on our ingredient pages.

A vegan omega-3 from Performance Lab: 3 softgels give 1,800mg algal oil (life's OMEGA 60) with 990mg total omega-3, including 540mg DHA and 270mg EPA, every amount on the label. The DHA dose sits below the 900mg-1.2g a day used in the positive memory trials, so it is a general-health omega-3 with a brain-health angle rather than a nootropic; the algae source and the vendor's carrageenan-free softgels are its main differentiators.