Three brain supplements. One works

LONGEVITY LATEST

We grade the claims so you don't waste years or money.

ISSUE 07 · 16 APRIL 2026 · THE BRAIN ISSUE

Three brain supplements. One is worth buying.

The other two have better marketing than evidence — and if you're taking them instead of the one that works, you're not just wasting money. You're wasting the window where intervention matters most.

This issue grades Lion's Mane, creatine, and phosphatidylserine against human trial data. We break down the DHA signal across 103,000 people. And we tear apart the £95/month "personalised" nootropic subscriptions — six pre-made blends and a quiz.

In this issue:

🧠 Top 3 — which brain supplements are worth buying, and which aren't

🔬 Spotlight — the strongest case yet for DHA, with one important catch

🚨 Hype Check — why "personalised" nootropic boxes are mostly marketing

⚡ Protocol — a four-week brain reset you can start today

🧠 Top 3 Interventions Under the Microscope

Here's the short version before we get into the studies.

1. Lion's Mane Mushroom — Evidence Grade: C+

What it claims. Hericium erinaceus contains compounds that stimulate nerve growth factor in the lab. The pitch is simple: eat a mushroom, grow new brain cells. It's the most Instagrammed supplement in this issue, and the most disappointing.

What the evidence says. The best RCT (Mori et al., n=30) found improved scores at 3 g/day — but gains vanished four weeks after stopping. A 2023 trial in healthy young adults (Docherty et al., n=41) found worse delayed recall than placebo. A 2025 systematic review pooled five RCTs and found an average gain of 1.17 MMSE points — modest at best. No standardised extract exists, products vary wildly, and the EFSA has approved nothing.

Verdict. Good story, weak proof. Right now, Lion's Mane is more compelling as an idea than as a purchase. Grade: C+.

2. Creatine Monohydrate (for cognition) — Evidence Grade: B

Bottom line: Creatine is not a miracle. It is one of the cheapest, safest, and most plausible cognitive supplements available. If you buy one thing from this issue, this is the easiest to justify.

What it does. Your brain stores creatine to recycle ATP — the energy currency that powers every thought. Only five per cent of your body's creatine is in the brain, but it's doing critical work. Think of it as a backup generator kicking in when the mains are under load — stress, sleep loss, complex tasks.

The evidence. A 2024 meta-analysis (Xu et al., 16 RCTs, n=492) found positive effects on memory and processing speed — especially in women and adults under sixty. But a 2026 commentary (Citherlet) flagged a statistical error inflating the pooled sample, and the EFSA declined to approve a cognition claim. The regulatory bar says no. The direction of the data says probably yes.

I've taken 5 g daily for three years. I can't isolate the cognitive effect cleanly, but the cost, safety, and plausible signal keep it in the rotation.

Grade: B. Not a nootropic miracle. A quiet workhorse. 3–5 g/day, £8–12/month. Skip the loading phase. The kidney concern has been debunked repeatedly in healthy adults.

3. Phosphatidylserine (PS) — Evidence Grade: C+

What it does. A phospholipid that helps keep cell membranes and signalling machinery working smoothly. In plain English: the grease in the gears. Your brain makes it, but production drops with age — which has made it a supplement target since the nineties.

The evidence. The bovine-cortex PS trials from the 1990s were strong — 149 people, significant memory benefit. Then BSE happened, the industry switched to soy-derived PS, and results got weaker. A meta-analysis of five RCTs (n=961) found positive memory effects in older adults with existing decline. The FDA's qualified health claim says it all: "very limited and preliminary evidence."

Verdict. The case for PS is narrow, not broad. Reasonable if you're older and already noticing decline. Hard to justify if you're healthy and younger. Grade: C+.

🔬 Spotlight: Omega-3 DHA & Cognitive Decline

Each 0.1 g/day increment in DHA was linked to 8–10% lower risk of cognitive decline across 103,651 participants.

A 2023 AJCN meta-analysis pooled 48 longitudinal studies (n=103,651). Dietary omega-3 lowered dementia risk by ~20%, strongest for DHA (RR: 0.82). A larger 2025 dose-response meta-analysis (Shahinfar et al., 58 RCTs) confirmed: significant improvements in attention and processing speed at 2 g/day. The pattern is consistent.

The catch: RCTs in cognitively healthy older adults show no significant effect. DHA helps most when the brain is already under pressure — early decline, low baseline, metabolic stress. Not perfect trial evidence. But plausibility, consistent data, and low downside make it easier to back than most supplements.

I'd been supplementing for years before I saw this data. It was the first time the numbers made me feel like I wasn't just guessing.

Verdict: If you're over forty, eat oily fish twice a week or supplement 1–2 g EPA+DHA daily. £10–20/month. Not exciting. Just correct. Strong buy.

🚨 Hype Check: "Personalised" Brain Supplement Subscriptions

Claim: Thesis ($79–$119/month), TruBrain ($89–$119/month), and Qualia Mind ($69–$139/month) promise "personalised cognitive optimisation" matched to your unique brain chemistry. Annual cost: north of £950.

Reality: The "personalisation" is a quiz that routes you to one of six pre-made blends. Not a custom formulation. Not even close.

Evidence: Zero RCTs testing any subscription system. The EFSA has approved no health claims for any branded nootropic stack. The most credible ingredient across these products — Lion's Mane — just scored C+ above.

What they're really selling: not cognitive precision, but the feeling that someone has simplified the problem for you. That feeling may be worth something. It isn't worth £95 a month.

Better alternative: Creatine (£8/month) + omega-3 (£15/month) = £23. Two interventions with actual meta-analyses. The subscription is optimised for recurring revenue, not for your hippocampus.

🥦 Quick win: Blueberries. 150–200 g daily, frozen is fine — retains anthocyanins better than fresh. A 2023 meta-analysis of 11 RCTs found significant memory improvement in older adults. The BKIND trial (2022, n=86) showed improved executive function at 24 weeks. About £1.50 a serving. Cheap, easy, and actually backed by decent evidence.

⚡ The 4-Week Cognitive Baseline Reset

A 2024 Neurology study (Rabin et al., n=2,831) found that physical activity plus cognitive engagement beat either one alone. The order below is deliberate — exercise and mental load come first because they do more than any capsule. Supplements layer on top. I ran a stripped-down version:

Week 1: Move. Three zone 2 cardio sessions, 30 min minimum.

Week 2: Strain the brain. One effortful cognitive challenge daily — language app, chess, technical reading.

Week 3: Add creatine. 5 g/day in water.

Week 4: Lock in omega-3. 1 g DHA+EPA daily. Optional PS at 200 mg if over 55.

Track it: Afternoon slump timing, focus-block duration, sleep consistency. What gets measured feels more real.

I noticed it most around 3 p.m. By week three, the wall had shifted about ninety minutes. Not dramatic. Real enough to notice.

Go deeper: Most nootropics tinker with the signal. The real question is whether the brain's power supply is failing first.

📊 Reader Pulse

Last week: "Which ageing hallmark concerns you most?" — Mitochondrial dysfunction won with 34%, chronic inflammation 28%, telomere shortening 22%, senescence 16%. The energy question is on your minds — which is why we built this issue around the brain's power supply. This week's question: do you currently take any supplement specifically for brain health?

📬 Next Week

Issue 08 tackles sleep, where the supplement aisle gets even murkier. Magnesium threonate, glycine, apigenin, melatonin, and the luxury sleep products charging absurd money for thin evidence. Got a sleep supplement story? Hit reply — it might make the issue.

Stay curious and stay healthy!

— Christian Thomsen, Editor

Know someone wasting money on brain supplements? Forward this issue. It takes ten seconds and might save them £950 a year on supplements that don't work.

Disclaimer: Longevity Latest is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any supplement regimen.

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