Does brainmaxing work? The evidence, graded

“Brainmaxing” is a label the internet put on a pile of different practices: sleeping properly, exercising, studying differently, playing timed tasks, and taking things. Asking whether it works is like asking whether a supermarket works. The four parts have four different answers, and mixing them is how a strong claim about the cheap part ends up selling the expensive one.

So this page grades them separately. A grade here belongs to one claim, in one population, for one preparation — never to a practice as a whole and never to this article. The table at the foot is the part designed to be quoted, because it carries the population and the weakest link that a quotation normally strips.

Sleep first, and it is not close. Pooling seventy studies and 147 cognitive measures, Lim and Dinges (2010) found short-term sleep deprivation degraded simple attention, working memory and processing speed, with the largest effects on attentional lapses [3]. That is a literature about the cost of losing sleep rather than a promise about gaining any, which is what the grade below says — but it means a week of short nights is visible on tasks as plain as pressing a key when a light changes.

Movement next. Ludyga and colleagues (2020) pooled long-term exercise programmes in healthy individuals and reported a small effect on cognitive measures, moderated more by who was exercising and how long the programme ran than by the type of exercise [4]. Small, real, and free.

Then how you study, which is the one most people can change today. Dunlosky and colleagues (2013) graded ten study techniques and put practice testing and distributed practice at the top, with highlighting, summarising and re-reading at the bottom [5]; Cepeda and colleagues (2006) pooled the spacing literature and found spaced study reliably beats the same amount massed together [6]. These are claims about retaining what you studied, which is narrower than “better thinking” and more useful than it.

Brain games are where the category makes its money and where the evidence is weakest. Practice on a task improves that task; training on one task moves performance on tasks that look very like it, modestly and unevenly [2]. Reaching further — to untrained abilities, to school results, to work — is where it stops: measured against control groups that are also doing something, the estimated effect is close to zero [1][2].

That is not a fringe reading. It is the conclusion of the largest review of consumer brain training that has been published [1], and the reason this site reports what you did on a task rather than what a task is supposed to do for you.

Supplements are the second place the claims outrun the evidence. This site keeps a separate, sourced note per compound rather than a verdict on the category, and the pattern across them is consistent: where a nutrient is genuinely low, correcting it matters; where it is not, the effects reported in healthy adults are small, inconsistent, and measured on laboratory tasks that are not your working day. A claim that a capsule beats a sleep schedule is a claim nobody has evidence for.

And two things that get sold as brainmaxing have no honest place here at all: anything measured as an intelligence score, because there is no norming sample behind a browser task and nobody should be sold a number about themselves that cannot be sourced; and anything promising an outcome in school, work or health, which is a claim this product does not make and would not know how to support.

A grade is the weakest of four links: how good the studies are, whether the preparation studied is the one you would use, whether the population studied is one you belong to, and whether the outcome measured is the thing you actually care about. A row graded moderate with “population match” as its weakest link is telling you that the studies are fine and the people in them may not be like you.

That is why you will not find a single letter at the top of this page. An article-level grade would let its weakest claim borrow the strength of its strongest, which is the exact move this whole page exists to refuse.

Fix the sleep window first, because it is free and the evidence under it is the best in the set. Move most days at a dose you will still be doing in a month. If you are learning something, test yourself instead of re-reading it, and space the attempts. Those three are the whole of the well-evidenced part, and none of them requires a purchase.

Play the timed tasks because a repeatable number about a narrow thing is genuinely useful — it shows you what a short night costs you — and not because the number is going to become something else. That is the honest version of the answer, and it is also the least sellable one, which is roughly how you can tell.

A grade belongs to one claim, in one population, for one preparation — never to a compound, a technique or an article. The weakest link is the part of the chain between the evidence and the thing you would actually do that is doing the least work.