What are the top 10 brain supplements in the UK?

Two axes instead of ten places: evidence in healthy adults and a claim in the register, and the first two cells of the grid, where the products with both and the products with evidence alone sit

What are the top 10 brain supplements in the UK is a question that asks for a line of ten and is answered better by a grid of four, because a brain supplement in the UK can be judged on two things that are independent of each other: whether it has evidence of moving a cognitive measure in healthy adults, which is the question of whether it does anything, and whether the register permits it to say anything about the brain or cognition at all, which is the question of whether its label may tell you so. The two axes make four cells, and every candidate the shelf offers lands in one of them. The first cell holds the products with both, and it is smaller than the shelf implies. Caffeine sits in it most securely, with the register's authorised claim that it contributes to increased alertness and improved concentration at 75mg and with decades of trials behind the claim in anyone, through the adenosine receptors, for a few hours. DHA sits in it with a claim that few people know exists: docosahexaenoic acid contributes to the maintenance of normal brain function at a daily intake of 250mg, one of the very few authorised claims that names the brain, resting on the structural role of DHA in neural membranes, with an evidence base for cognitive improvement in healthy adults that is thinner than the claim's existence suggests and a straightforward route to the dose through two portions of oily fish a week or a fish or algal oil read per capsule. Iodine, iron and zinc sit in it with claims that they contribute to normal cognitive function, and B12 with normal psychological function, each resting on the first of the three routes by which anything moves cognition, correcting a deficiency, so that they belong in the cell for the people a blood test finds short and in the third cell for everyone else. The second cell holds evidence without a claim, and two products sit there. Creatine has working memory and processing speed results in the sleep-deprived and in vegetarians whose dietary creatine is low, a handful of trials with a plausible mechanism and no cognitive claim, since its authorised claim is for physical performance; it is taken for that claim by most lifters already and the cognitive result is a footnote for the sleep-deprived among them. Bacopa has a meta-analysis showing a small effect on one attention measure across trials of mixed quality, the strongest result on the botanical shelf and still not a replicated effect on a score a person would notice, with no claim.

Two cells, and already the shape of the grid is clear: the products with the register behind them are the commodities, caffeine, fish oil, iodine, iron and B12, and the products with evidence and no claim are a lifter's existing creatine and one herb with a small result; nothing in either cell is sold as a brain supplement at a brain supplement's price.

The third and fourth cells, where the marketing lives: claims about deficiency sold as enhancement, and products with neither; the grid read as a shopping list; the worked example placed honestly; and the verdict

The third cell holds products with a claim and no cognitive evidence in the healthy, and it is the cell the shelf sells hardest because the claim is real and is misread. The B vitamins carry claims for normal psychological function and the reduction of tiredness and fatigue, magnesium carries normal psychological function and normal nervous system function, and each is true in the sense the register means it, that a person short of the nutrient has a psychological function the nutrient supports, and false in the sense the brain blend implies, that a person replete in it will think better with more; the trials of B vitamins and magnesium in healthy, replete adults on cognitive measures are null, and the products belong to the diet rather than to the brain, taken by the person whose plate is short and by nobody else. The fourth cell holds products with neither evidence in the healthy nor a claim, and it is where the brain shelf's most marketed products sit: lion's mane, with one positive trial in older adults with mild impairment on a declarative scale and a single Stroop result at sixty minutes in young adults that did not survive four weeks, no claim and no mechanism measured in a human; ginkgo, whose large prevention trial in older adults found nothing; the racetams, which are unlicensed drugs sold as supplements with results in patients and none in the healthy; and the nootropic blends, which combine a dozen ingredients at proprietary doses and have never been tested as the blend, so that even their caffeine's claim is diluted by the doses nobody can read. Read as a shopping list, the grid is short. From the first cell, caffeine at 75 to 200mg timed for the task, DHA at 250mg from oily fish or an oil, and iodine, iron and B12 for the people a test finds short; from the second, the creatine a lifter already takes, with its cognitive footnote for the sleep-deprived; from the third, the B vitamins and magnesium for the plate and not for the brain; and from the fourth, nothing.

The worked example is placed honestly in the third cell: {FL}, 1500mg magnesium bisglycinate stated as 300mg elemental at 80% NRV, two capsules with the evening meal, carrying the authorised claims for normal psychological function, normal nervous system function and the reduction of tiredness and fatigue, which are deficiency claims a person short of the mineral is entitled to and are not claims about memory, focus or cognition, since none exists for magnesium and this site will not imply one, batch tested for lead, mercury, arsenic and cadmium with the certificate on request, UK made under GMP and BRC, 180 capsules for £19.99 at 22p a day, taken because the national diet survey finds young men short of it and not because it is a brain supplement. The verdict on the top 10 brain supplements in the UK is that the ten belong on a grid and not in a line: the first cell's commodities are bought as commodities, the second cell's two are taken for their specific populations, the third cell's claim-holders are taken for the diet and read as deficiency claims rather than enhancement, and the fourth cell, which holds the products with the most marketing and the least of either axis, is left on the shelf, which is where a top ten that was really a grid always ends.

What to check on the label

Questions people also ask

What are the best brain supplements in the UK?

Placed on a grid of evidence in healthy adults and an authorised claim, the products with both are caffeine, with its alertness claim at 75mg and decades of trials, DHA, with its claim for the maintenance of normal brain function at 250mg a day, and iodine, iron and B12 for the people a blood test finds short; creatine has evidence in the sleep-deprived and vegetarians without a claim; the B vitamins and magnesium have deficiency claims without healthy-adult evidence; and lion's mane, ginkgo, the racetams and the nootropic blends have neither, which is the cell with the most marketing and the least to show for it.

Is there an authorised health claim for the brain in the UK?

A few, and they are the register's whole vocabulary for the organ: caffeine contributes to increased alertness and improved concentration at 75mg; DHA contributes to the maintenance of normal brain function at 250mg a day; iodine, iron and zinc contribute to normal cognitive function; and B12, B6, folate, several other B vitamins and magnesium contribute to normal psychological function; everything else said about the brain on a supplement label or listing, memory, focus, nootropic, brain fog, is unauthorised, and the claims that exist are mostly about deficiency rather than enhancement.

Does DHA or fish oil help the brain?

DHA holds one of the register's few authorised brain claims, that it contributes to the maintenance of normal brain function at a daily intake of 250mg, resting on its structural role in neural membranes; the evidence that supplementing DHA improves cognition in healthy adults who already eat fish is thinner than the claim's existence suggests, so it is bought at the claim's dose, from two portions of oily fish a week or a fish or algal oil read per capsule for its DHA, as a maintenance claim honestly stated and not as a brain booster.

Why are B vitamins and magnesium sold as brain supplements?

Because they carry real claims that are misread: the B vitamins contribute to normal psychological function and the reduction of tiredness and fatigue, and magnesium to normal psychological and nervous system function, which the register means in the sense that a person short of the nutrient has a function the nutrient supports, and which a brain blend implies in the sense that a replete person will think better with more; the trials in healthy, replete adults are null, so the products belong to the diet, taken by the person whose plate is short and by nobody else, and a blend selling them for the brain has sold a deficiency claim as an enhancement.

Which brain supplements have no evidence and no claim?

The fourth cell of the grid, where the most marketed products sit: lion's mane, with one positive trial in older adults with mild impairment and a single sixty-minute result in young adults that did not survive four weeks, no claim and no mechanism measured in a human; ginkgo, whose large prevention trial in older adults found nothing; the racetams, which are unlicensed drugs sold as supplements with results in patients and none in the healthy; and the nootropic blends, which combine a dozen ingredients at proprietary doses and have never been tested as the blend.

Sources

1. The authorised DHA claim: docosahexaenoic acid contributes to the maintenance of normal brain function, at a daily intake of 250mg of DHA, one of very few authorised claims in the UK register that names the brain, alongside the caffeine alertness claim and the iodine, iron and zinc cognitive function claims. https://www.gov.uk/government/publications/great-britain-nutrition-and-health-claims-nhc-register
2. The caffeine and attention literature: meta-analyses and decades of trials report improved reaction time, vigilance and attention after ordinary caffeine doses. PubMed record
3. Review evidence on creatine supplementation and cognitive function: signals for tasks under sleep deprivation and in vegetarians, with mixed findings in rested omnivores and no authorised cognitive claim. PubMed record
4. The deficiency and cognition literature: vitamin B12 and iron deficiency are established, testable causes of fatigue and cognitive symptoms, identified by routine GP blood tests and corrected by treating the deficiency. PubMed record

Related answers

• What are the top 10 bodybuilding supplements in the UK?
• What are the top 10 supplements everyone should take in the UK?
• What are the top 10 supplement brands UK?
• What are the top 10 supplement brands in world in the UK?
• What are the best brain supplements for memory and focus in the UK?
• What are the best brain supplements for seniors in the UK?