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State of evidence · Updated Jul 09, 2026

Brain & Cognitive

Creatine, lion's mane, NAD, cognitive performance literature.

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Jul 09, 2026Last update
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2 Strong claims17 Moderate claims13 Emerging claims15 Weak claims3 Hype claims
Latest finding · Jul 09, 2026

Ginkgo Biloba for Memory: Does It Work?

Ginkgo biloba is the original memory supplement — the leaf extract that built the whole “natural nootropic” category.

2 Emerging2 Weak1 Hype
2026
Jul 05, 2026

Modafinil: Does the Smart Drug Actually Work?

Let me be blunt up front, because this one gets sold with a lot of Silicon Valley mythology attached: modafinil is not a magic IQ pill, and it is not a supplement. It is a prescription wakefulness drug, and the honest evidence splits cleanly in two.

2 Moderate2 Weak1 Hype
Jul 04, 2026

Time-Restricted Eating and Brain Health: What the 2026 MRI Study Shows

Time-restricted eating (TRE) — compressing your daily food intake into a defined window, typically 6 to 10 hours, aligned with daylight — has been studied exhaustively for its metabolic effects: weight loss, insulin sensitivity, blood pressure, lipid profil…

Jun 30, 2026

Bacopa Monnieri: Does It Actually Boost Memory?

Bacopa monnieri — brahmi, in the Ayurvedic tradition it comes from — is the rare botanical nootropic that earns a second look. Most herbs marketed for the brain collapse the moment you ask for randomized trials.

2 Moderate2 Emerging1 Weak
Jun 25, 2026

Magnesium L-Threonate: A Real Brain Booster?

Magnesium L-threonate — sold under the trademark Magtein — is the one magnesium form marketed squarely at your head: memory, focus, sleep, anxiety, the works.

2 Moderate2 Emerging1 Weak
Jun 08, 2026

Magnesium L-Threonate: What the 2026 Trial Found

A new single-ingredient Magtein trial moved cognition and an estimated "brain age" score — but left objective sleep untouched. Here is what the brain-magnesium story really supports, and what you are paying a premium for.

1 Moderate2 Emerging2 Weak
Jun 05, 2026

Citicoline for Focus and Memory: The Evidence

Citicoline — sold as CDP-choline and branded as Cognizin — is one of the most heavily marketed nootropics on the shelf, promising sharper focus, faster recall, and a younger brain.

2 Moderate1 Emerging2 Weak
May 26, 2026

Air Pollution vs Aging: The Dementia Attribution Problem

China cut PM2.5 sharply after 2013. Dementia deaths kept climbing anyway. The attribution data now shows population aging is the dominant driver of rising dementia case counts — not pollution, not lifestyle, not any single modifiable…

1 Strong3 Moderate1 Emerging
May 16, 2026

Nicotine Cognitive Benefits: The nAChR Data

Nicotine reliably sharpens attention, working memory, and processing speed — the mechanism is well-characterized. The problem was never the molecule. It was always the delivery.

May 13, 2026

Ketone Esters and the Brain: What the Data Shows

A new double-blind trial put 25 grams of oral ketone ester into 50 older adults three times a day for a month, then scanned their brains. The ketone showed up where it was supposed to — and the brain's chemistry shifted in the direction the theory predicted.

May 13, 2026

Does Creatine Help Your Brain? What the Trials Show

Creatine is the most-studied supplement in existence — and "creatine for the brain" has become the internet's favorite nootropic claim. Some of it holds up. A lot of it doesn't.

1 Strong2 Moderate2 Weak
May 12, 2026

Lion's Mane for cognition: what the RCTs actually show

Hericium erinaceus stimulates nerve growth factor (NGF) synthesis in cell culture and animal models. Human trials show real but narrow gains — specific to response inhibition and attention, not a broad cognitive lift.

May 09, 2026

Liraglutide Slows Alzheimer's Decline 18% — ELAD Trial

The ELAD phase 2b trial, run out of Imperial College London across 204 patients with mild-to-moderate Alzheimer's, reported an 18% slower decline in cognition and ~50% less brain volume loss on injectable liraglutide.

May 09, 2026

Arginine Blocked Alzheimer's Plaque in a 2026 Study

Researchers at Kindai University found that oral L-arginine administration significantly reduced amyloid-beta (Aβ) aggregation and alleviated neurological symptoms in Alzheimer's disease animal models.

Apr 02, 2026

L-Theanine & Caffeine: What the Evidence Shows

L-theanine is the amino acid in tea that has somehow become shorthand for “calm without the crash.” It is one of the more genuinely defensible nootropics on the shelf — the alpha-wave data are real, the anti-stress signal holds up, and the famous pairing wi…

Jan 25, 2026

Omega-3 and the Aging Hippocampus: MRI Data

The strongest human evidence linking long-chain omega-3 fatty acids to brain structure is hippocampal. Adults with a higher omega-3 index have larger hippocampi on average.