4 studies from top journals ✓ 12 claims checked word for word
Does creatine make you smarter? The science, unfolded
Creatine is famous for building muscle. But does it make you smarter? Four studies on memory, intelligence and mental fatigue, unfolded.
Backed by science
- Supplements raise brain creatine (slowly)
- Memory & intelligence ↑ in vegetarians
- Memory ↑ in older adults (66–76)
Not backed
- A memory boost for younger people in general
- Protection against mental fatigue
Sources
- Candow DG et al. (2023). "Heads Up" for Creatine Supplementation and its Potential Applications for Brain Health and Function. Sports medicine (Auckland, N.Z.) Review
- Rae C et al. (2003). Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial. Proceedings. Biological sciences Randomised trial
- Prokopidis K et al. (2023). Effects of creatine supplementation on memory in healthy individuals: a systematic review and meta-analysis of randomized controlled trials. Nutrition reviews Meta-analysis
- VAN Cutsem J et al. (2020). Can Creatine Combat the Mental Fatigue-associated Decrease in Visuomotor Skills?. Medicine and science in sports and exercise Randomised trial
Limitations
- The 2003 trial only included 45 young vegetarians, who get little creatine from food; the result may not apply to everyone.
- The 2023 meta-analysis pooled 8 small trials with a moderate risk of bias and large differences between studies; the authors themselves call for caution.
- The mental-fatigue trial had 14 participants and lasted one week.
- The 2023 review in Sports Medicine is a narrative review: it explains the mechanism, it is not new evidence.
Transcript
Creatine is for muscles. But does it also make you smarter?
We unfolded four studies from top journals.
The idea: your brain uses about 20% of your body's energy, and creatine helps keep it supplied. Supplements can raise brain creatine, but slowly, and only a little.
In a 2003 trial, 45 young vegetarians took five grams a day for six weeks. Their working memory and intelligence test scores went up.
A meta-analysis of eight trials found the memory boost mainly in older adults. In younger people, it was close to zero.
And against mental fatigue? In 14 adults, a week of high-dose creatine did not stop the drop on short reaction tests.
Caveat: these were small trials, often in specific groups, and quality varied.
Let's unfold. What is backed by science? Creatine can raise brain creatine. It improved memory and intelligence scores in vegetarians. And memory in older adults. What's not backed: a memory boost for younger people in general, or protection against mental fatigue.
How we checked this
Every claim in this video is linked to a literal quote from a paper. Software confirmed that all 12 quotes appear in the source text (8 checked against the full paper, 4 against the abstract). A human editor reviewed and approved the video before publication.