Cognitive & Nootropics

Chasing sharper focus or a clearer head? Read the evidence before you buy. Lion's mane, alpha-GPC, bacopa, ginkgo, and brain performance supplements.

Alpha-GPC

Alpha-GPC

Supports cognitive function in age-related decline, increases power output in athletes, and provides a highly bioavailable source of choline that crosses the blood-brain barrier.

Weak Evidence10 products
Lion's Mane Mushroom

Lion's Mane Mushroom

Cognitive support and neuroprotection through nerve growth factor (NGF) stimulation

Weak Evidence10 products
Magnesium L-Threonate

Magnesium L-Threonate

Brain magnesium levels, cognitive function, memory support

Weak Evidence10 products
Ginkgo Biloba

Ginkgo Biloba

Marketed for cognitive enhancement and dementia prevention, but the largest clinical trials have failed to support its most popular claims. Modest evidence exists for peripheral circulation and existing mild cognitive impairment.

Mixed Evidence10 products
Bacopa Monnieri

Bacopa Monnieri

Memory enhancement, particularly delayed recall and learning rate, with secondary benefits for attention and anxiety reduction

Mixed Evidence10 products
Acetyl-L-Carnitine

Acetyl-L-Carnitine

Diabetic peripheral neuropathy, cognitive aging support, mitochondrial energy in brain and nerve tissue

Mixed Evidence10 products
Citicoline

Citicoline

Attention, focus, age-related memory support, and cognitive recovery after ischemic insults

Mixed Evidence8 products
Phosphatidylserine

Phosphatidylserine

Modest support for age-related memory complaints; cortisol blunting in trained athletes at higher doses

Mixed Evidence9 products
Lemon Balm

Lemon Balm

Mild stress and anxiety reduction, sleep onset support, acute calmness and cognitive performance

Mixed Evidence7 products
Mucuna Pruriens

Mucuna Pruriens

Plant source of L-DOPA studied in Parkinson's disease; speculative use for mood, libido, and male fertility

Mixed Evidence10 products
Huperzine A

Huperzine A

Cognitive function in Alzheimer's disease and vascular dementia via reversible acetylcholinesterase inhibition

Mixed Evidence10 products
Agmatine Sulfate

Agmatine Sulfate

Sold heavily in pre-workouts for 'pumps' and as a neuropathic pain or mood aid; the marketing is far ahead of the human evidence on every one of those claims

Mixed Evidence8 products
NMN (Nicotinamide Mononucleotide)

NMN (Nicotinamide Mononucleotide)

Raises blood NAD+ levels; preliminary signals for insulin sensitivity, physical function, and aerobic capacity in midlife and older adults

Weak Evidence8 products
Nicotinamide Riboside (NR)

Nicotinamide Riboside (NR)

NAD+ elevation as a cellular metabolism support; downstream functional benefits in humans remain unconfirmed

Weak Evidence9 products
TMG (Trimethylglycine / Betaine Anhydrous)

TMG (Trimethylglycine / Betaine Anhydrous)

Homocysteine lowering via methylation support, with modest power-output and muscle endurance signal in resistance-trained men

Mixed Evidence6 products
Sulforaphane

Sulforaphane

Activation of the Nrf2 antioxidant defense pathway and phase II detoxification enzymes

Weak Evidence8 products
Lutein + Zeaxanthin

Lutein + Zeaxanthin

Macular pigment density, visual performance under glare and screen-time conditions, and reduced risk of advanced AMD progression in higher-risk older adults

Likely Effective8 products
MCT Oil

MCT Oil

Rapid ketone fuel, modest body composition support when substituted for long-chain fats, and a studied adjunct in mild Alzheimer's cognitive decline

Mixed Evidence10 products
Spermidine

Spermidine

Marketed as a natural polyamine that supports cellular renewal (autophagy); the human evidence for downstream cognitive or longevity benefits is small and the largest RCT missed its primary endpoint

Weak Evidence8 products
Palmitoylethanolamide (PEA)

Palmitoylethanolamide (PEA)

Studied for nerve discomfort, low back pain with sciatic involvement, and general pain comfort via PPAR-alpha activation and modulation of mast cell and glial cell signaling.

Mixed Evidence8 products
Pterostilbene

Pterostilbene

Polyphenol with better oral bioavailability than resveratrol; small human RCT base for blood pressure and as a co-ingredient in NAD+ stacks

Weak Evidence8 products
L-Tyrosine

L-Tyrosine

Supports working memory and cognitive performance under acute stressors (cold, sleep loss, demanding mental load)

Mixed Evidence10 products
PQQ (Pyrroloquinoline Quinone)

PQQ (Pyrroloquinoline Quinone)

Mitochondrial cofactor marketed for cellular energy and cognitive support; small, mostly industry-funded human trials at 20mg/day

Weak Evidence8 products
Saffron

Saffron

Mood support, mild low-mood and stress, sleep quality, and PMS-related symptoms

Mixed Evidence8 products
Choline Bitartrate

Choline Bitartrate

Cheapest way to cover the daily choline Adequate Intake for general health, methylation, and pregnancy; weakest choline form for cognitive or nootropic use

Mixed Evidence10 products
Pycnogenol

Pycnogenol

Supports leg comfort and venous tone in chronic venous insufficiency, healthy blood flow via endothelial function, and skin elasticity at 100-360mg/day of the trademarked Pycnogenol extract.

Mixed Evidence9 products
Sunflower Lecithin

Sunflower Lecithin

Soy-free phospholipid blend (phosphatidylcholine, PI, PE, PA) traditionally used by breastfeeding women under lactation-consultant guidance for recurrent plugged-duct comfort; also a food-grade emulsifier and a modest dietary source of choline.

Weak Evidence7 products
SAMe (S-Adenosylmethionine)

SAMe (S-Adenosylmethionine)

A methyl donor synthesized in the body from methionine and ATP that supports a positive mood, joint comfort, and liver function via methylation, transsulfuration, and aminopropylation pathways.

Likely Effective8 products
Schisandra

Schisandra

Traditional adaptogen used for stress resilience, mental performance under fatigue, and liver support; modern human RCT base is thin compared to other adaptogens.

Weak Evidence10 products

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.