1,602 people and what ketones did to their thinking

Most of the supplement industry runs on one study of twelve college students, funded by the company selling the powder.

This is not that.

In April 2026, Frontiers in Nutrition published a systematic review and meta-analysis of exogenous ketones and cognition. Thirty-eight studies. 1,602 participants. Healthy adults, people with mild cognitive impairment, people with Alzheimer's.

Ketones beat placebo. And then it found something more useful than that.

Short answer: pooled across 29 protocols and 1,117 people, exogenous ketones produced a statistically significant improvement in cognitive performance versus placebo, with a standardized mean difference of 0.29. The effect is real and it is modest. The more interesting finding is that higher daily doses were associated with bigger improvements.

Why a meta-analysis is worth more than a study

Any single trial can get lucky. Twenty people, one good day, a result that never repeats. That is how most supplement marketing gets made.

A meta-analysis pools many trials and asks whether the effect survives being averaged across all of them, including the ones that found nothing. It is a much harder test to pass.

This one also scored the quality of what it pooled. Mean PEDro score was 7.9 out of 10, which is high. These were not junk studies.

The number

Standardized mean difference of 0.29, with a 95 percent confidence interval of 0.16 to 0.41, and a p value under 0.001.

In plain terms: the improvement is statistically solid, the confidence interval does not cross zero, and by the usual convention an SMD of 0.29 is a small effect.

We are telling you it is small because it is. Anyone selling you ketones as a brain transplant is lying, and the actual data is good enough that they did not need to.

The finding that matters more

Buried past the headline number is the one that should change how you buy.

The meta-regression found a positive association between daily ketone dose and cognitive improvement. More ketones, more effect.

That is the argument against every product that puts a dusting of BHB on a label so it can print the word ketones on the front. If the response scales with dose, an underdosed product is not a smaller version of the result. It is closer to none of it.

What this does not say

Four things, so you are not surprised when someone points them out.

The effect is modest. Said it twice on purpose.

MCTs dominated the dataset. Nineteen of the studies, covering 1,054 participants, used medium chain triglycerides at 6 to 56 grams a day. Ketone esters appeared in fifteen studies but only 300 participants. BHB salts, which is what Godspeed uses, were in there but were not the bulk of it.

The subgroup comparisons were not significant. Type of supplement, duration, population, whether there was an acute cognitive stressor, none of those splits reached significance. So the review cannot tell you that one format beats another, and we are not going to pretend it did.

The authors themselves called the result modest improvements across diverse populations and study designs, and asked for larger, longer trials to pin down the best dose and formulation. That is the correct read.

Where Godspeed actually sits

One stick carries 6 or more grams of goBHB ketones. That is a real dose in a category full of fairy dust, and the dose-response finding is the reason it is built that way.

What we are not going to do is map that meta-analysis onto this product and call it proven. The pooled dataset leaned on MCTs, the formats were not separable, and nobody has run this trial on Godspeed.

The honest version: the best available evidence says exogenous ketones measurably help cognition, modestly, and that more is better than less. We built to that, rather than around it.

FAQ

Do ketones improve focus and cognition?

Yes, modestly. A 2026 systematic review and meta-analysis in Frontiers in Nutrition pooled 38 studies and 1,602 participants and found exogenous ketones improved cognitive performance versus placebo, with a standardized mean difference of 0.29, p less than 0.001. That is a small but statistically reliable effect across healthy adults and people with cognitive impairment.

How much BHB do you need for a cognitive effect?

The meta-analysis found a positive relationship between daily dose and cognitive improvement, so higher doses tracked with larger effects, but it did not establish a single threshold. Doses across the included studies ranged widely, from 6 grams a day of MCTs up to 56, and one ketone ester trial used 45 grams a day for fourteen days.

Are ketone salts as good as ketone esters for the brain?

The review could not separate them. Subgroup analysis by supplement type did not reach statistical significance, which means the data does not support ranking the formats against each other. Anyone telling you otherwise is going past the evidence.

Is this effect big enough to feel?

A standardized mean difference of 0.29 is a small effect by convention. It shows up reliably across a large pooled sample, which is a different thing from being dramatic for any one person on any one morning. Treat it as a real edge, not a transformation.