What is the best brain supplement that actually works?

Actually works has a definition: the three routes by which anything has ever moved a cognition score in a human, and who is on each route

What is the best brain supplement that actually works is a question whose last three words are usually a sigh and should be a standard, because actually works has a precise meaning in a cognition trial and the whole literature can be sorted by it: anything that has ever moved a cognition score in a human being, a memory test, an attention task, a reaction time, a reasoning scale, did it by one of only three routes. The first route is correcting a deficiency. B12, in people who were deficient, restores the cognitive scores and the nerve function that the deficiency had lowered, and does nothing measurable in people who were replete; iron, in women with low iron stores, restores attention and memory scores in the trials and does nothing in women with normal stores; thiamine in the depleted, folate in the deficient, and vitamin D in the severely low follow the same shape, a score lowered by a lack and raised by its correction, with no effect past the point of repletion. The first route is real, it is the route most brain supplement marketing borrows its claims from, and it is entered through a blood test rather than a shelf, since a person who does not know whether they are deficient does not know whether they are on it. The second route is changing a state. Caffeine raises alertness and attention for hours at 75mg and above, which is the one authorised cognitive claim in the UK register and the basis of dozens of trials, and it does so in anyone, not only the deficient, because it blocks the receptor that accumulates sleep pressure; sleep, or its absence, moves every cognitive score there is, with a short night lengthening reaction time, multiplying lapses and removing the overnight consolidation that stores what was learned, and a consolidated night restoring all three; and creatine, in a handful of trials, moves working memory and processing speed in the sleep-deprived and in vegetarians whose dietary creatine is low, which is a state effect in a specific population rather than a general enhancement. The third route is a drug: the prescription medicines for attention disorders and for dementia act on receptors and enzymes, move scores in the populations they are licensed for, carry the costs of doing so, and are not on a supplement shelf, by definition and by law.

Three routes, and the question for any brain supplement is which route it claims to be on and whether a trial has shown it there. A product that claims the first route is asking who is deficient, which a blood test answers; a product that claims the second is asking what state it changes, which caffeine answers and the shelf's other candidates do not; and a product that claims to work in healthy, replete, well-slept adults by neither of those routes is claiming the third, which is a claim to be a drug, and the nootropic shelf's failure to produce a replicated result in that population is the predictable consequence of being a food supplement that is not one.

The nootropic shelf held to the standard, what a healthy lifter actually buys on each route, the worked example's honest claim, and the verdict

Held to the three-route standard, the nootropic shelf is short of results. Lion's mane has one positive trial in older adults with mild impairment on a declarative scale and a young-adult pilot with a single Stroop result at sixty minutes that did not survive four weeks, which is neither a deficiency corrected nor a state changed in a healthy adult. Bacopa has a meta-analysis showing a small effect on one attention measure across trials of mixed quality, which is the strongest result on the botanical shelf and still not a replicated effect on a score a lifter would notice. Ginkgo's large prevention trial in older adults found nothing. The racetams are unlicensed drugs sold as supplements with trial results in patients and none in the healthy. The B vitamin brain blends work by the first route in the deficient and not otherwise, which the blend's marketing does not say. The blends of everything, with a proprietary dose and twenty ingredients, have never been tested as the blend. The placebo literature explains the rest: cognitive tests in healthy adults are susceptible to expectancy, motivation and practice, so that a person who takes a product called focus and feels focused has reported the label, which is why the standard is a replicated result against placebo and why the shelf has not met it. What a healthy lifter actually buys on each route is short and cheap. On the first route, a blood test if there is a reason to suspect a deficiency, fatigue, a restricted diet, heavy training in a woman with heavy periods, and the correction of whatever it finds; on the second, caffeine at 75 to 200mg timed for the task that needs attention and kept out of the afternoon so the state it changes is not the night's, a bedtime, and creatine monohydrate for the lifter who is short of sleep or of meat, which he is probably taking already for other reasons; on the third, nothing, because the third route is a prescription.

The worked example claims normal psychological function and nothing about the brain beyond it: {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 claims about the first route in a person whose diet is short of the mineral and are not claims about memory, focus or cognition, because none exists for magnesium, 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. The verdict on the best brain supplement that actually works is that the phrase has a standard and the standard has three routes: a deficiency corrected, which a blood test and the nutrient it names achieve; a state changed, which caffeine with its authorised claim, a consolidated night and creatine in the sleep-deprived achieve; and a drug, which no supplement is. The best brain supplement that actually works is therefore the blood test, the coffee timed for the task, the bedtime and the creatine already in the cupboard, and the nootropic shelf, held to its own phrase, has not yet earned a place beside them.

What to check on the label

Questions people also ask

What is the best brain supplement for adults that actually works?

Held to what actually works means in a cognition trial, the answer is the three routes by which anything has ever moved a score: correcting a deficiency, which a blood test finds and B12, iron or thiamine corrects in the deficient only; changing a state, which caffeine does for attention with an authorised claim at 75mg and above, a consolidated night does for consolidation and reaction time, and creatine does for working memory in the sleep-deprived and in vegetarians; and a prescription drug, which no supplement is; the nootropic shelf has not moved a healthy adult's score by any route in a trial that survived replication.

Do nootropics actually work?

Not in healthy, replete, well-slept adults by any replicated trial: lion's mane has one trial in older adults with impairment and a sixty-minute result in young adults that did not last four weeks, bacopa has a small meta-analytic effect on one attention measure across mixed-quality trials, ginkgo's large prevention trial found nothing, the racetams are unlicensed drugs with results in patients, and the blends have never been tested as blends; cognitive tests in healthy adults are susceptible to expectancy and practice, which is why a product called focus produces the feeling of its label and why the standard is a result against placebo that was replicated.

Is caffeine the only supplement proven to improve focus?

It is the only one with an authorised cognitive claim in the UK register, that caffeine contributes to increased alertness and improved concentration at 75mg, and the only one that changes a cognitive state in anyone rather than only in the deficient, by blocking the receptor that accumulates sleep pressure, for a few hours, with tolerance building on daily use; creatine moves working memory in the sleep-deprived and in vegetarians in a handful of trials, which is a state effect in a specific population, and the deficiency route, B12, iron and thiamine, works only in people a blood test finds short.

Should I get a blood test before buying brain supplements?

If there is a reason to suspect a deficiency, yes, because the first of the three routes, correcting a deficiency, is the one most brain supplement marketing borrows its claims from and the one a blood test actually answers: fatigue and poor concentration with a restricted or vegan diet suggest B12, heavy training in a woman with heavy periods suggests iron, and a winter in the UK suggests vitamin D; a person who is deficient gains from the nutrient the test names, a person who is replete gains nothing from the same nutrient, and the shelf's B vitamin brain blends work only for the first person and do not say so.

Does magnesium help brain function or memory?

It carries authorised claims for normal psychological function and normal nervous system function, which are claims about the first route in a person whose diet is short of the mineral, and no claim about memory, focus or cognition, because none exists; the national diet survey finds a large share of young men below the reference intake, so a lifter on a diet short of greens, nuts, seeds and whole grains takes it at a stated elemental dose for the processes the claims name, and a magnesium sold as a brain supplement has printed a claim nobody authorised.

Sources

1. 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
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. The iron and cognition trials in women: iron supplementation in iron-deficient women of reproductive age improves attention, memory and learning in randomised trials, with the gain proportional to the rise in ferritin and haemoglobin, and no cognitive benefit in iron-replete women. PubMed record
4. The placebo and expectancy literature in cognitive enhancement: expectation alone improves self-reported and some measured cognitive performance in healthy adults, so a nootropic's effect is the difference between its arm and a matched placebo arm rather than the change from baseline. PubMed record

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