Brain supplements in the UK: how to pick a good one

Before comparing brands, it helps to know the rules everyone is supposed to be working within. In Great Britain, a nutrition or health claim on a food supplement can only be used if it appears on the official GB nutrition and health claims register. That register is short, specific about wording and specific about the amount required to earn it. Anything outside that list — 'boosts memory by 40%', 'clinically proven to sharpen focus', 'may help prevent cognitive decline' — is not an authorised claim, however confidently it is printed.

This matters for brain supplements more than most categories, because the subject is emotionally loaded. Worry about memory, or about a parent's decline, makes hopeful wording land differently than it would for, say, a vitamin C tablet. Reading claims with the register in mind is the single most useful filter you can apply before you look at price, packaging or reviews.

A handful of nutrients relevant to brain and nervous-system function do have authorised wording behind them, and they are worth knowing by name. DHA, a long-chain omega-3 fat, contributes to the maintenance of normal brain function at a daily intake of 250mg. Vitamin B12 contributes to normal psychological function and to the reduction of tiredness and fatigue. Iodine, zinc and iron each carry their own cognitive or nervous-system wording too.

None of these claims promise improvement above a normal baseline, and none of them mention dementia, memory loss as a condition, or any diagnosis. That is a deliberate and sensible limit: they describe a nutrient's contribution to normal function, not a treatment.

A long ingredient list is easy to print and impressive to glance at. It is also close to meaningless without amounts next to each item. Many products include a fashionable ingredient — lion's mane, ginkgo, bacopa — at a fraction of the amount used in the research it is riding on the coat-tails of, purely so the name appears on the front of the pack.

If a label does not publish milligrams per capsule for every ingredient, assume the amount is small enough that the company would rather you didn't ask. A reputable supplement has nothing to lose by printing the full breakdown, because the breakdown is the whole point of buying it deliberately rather than picking whatever is cheapest on the shelf.

If a label says 'proprietary brain blend 450mg' without breaking down what is inside, you cannot compare it to anything, and you cannot tell whether the headline ingredient is present at 400mg or 4mg. This labelling style is legal, but it exists to obscure rather than inform.

Good products publish every individual amount on the supplement facts panel, ingredient by ingredient, so you can check it against published research amounts or authorised claim thresholds yourself rather than trusting marketing copy.

Slick packaging, a clinical-looking logo and a wall of five-star reviews say very little about whether a product works or is honestly labelled. What matters is what the company is willing to promise in writing, and how they respond if you are not satisfied.

The most useful question before buying anything is: what is my diet missing? Most UK adults eat well under the two portions of oily fish a week recommended by the NHS, which is the main dietary source of DHA. B12 comes almost exclusively from animal foods, so vegans, vegetarians and anyone with reduced stomach acid are more likely to fall short. A supplement makes most sense as a top-up for a specific, identifiable gap rather than as a blanket fix.

If you already eat oily fish twice a week and a varied diet with meat, eggs or dairy, you may need less from a supplement than someone who does not — and it is worth being honest with yourself about that before you buy.

Enervia is one capsule a day combining DHA from cod liver oil, phosphatidylserine, choline, lion's mane, vitamin B12 and astaxanthin, with every amount published on the label rather than hidden in a blend, no subscription, and a 60-day money-back guarantee. We would rather you judge it against the six points above than against our own marketing.

That also means being upfront about limits: phosphatidylserine, choline, lion's mane and astaxanthin do not carry an authorised health claim in Great Britain. We include them because they are genuinely studied ingredients with a plausible role in cell membranes and everyday alertness, but we are not going to imply a claim the register does not support.