Creatine and mental health: the evidence is promising but still small

What happened

Creatine is moving from the gym bag into the mental health conversation, and the research has not kept pace. That is the gist of an explainer, as first reported by Medical Xpress.

The piece says creatine's benefits for strength and athletic performance are well supported. It adds that the supplement is increasingly recommended for mental effects, where the support is thinner.

It points to two small studies. In one, people who were sleep deprived and took creatine did better on short-term memory, reaction speed and information processing. In the other, people with Alzheimer's showed encouraging changes in fluid intelligence, reading and working memory.

The article itself says neither is enough to recommend creatine for those uses. Its own bottom line is that every study on mental or cognitive health so far has been quite small. This is an explainer, not a report on one new trial.

What the underlying research shows

Depression has the most data. A meta-analysis by Eckert, Lima and Dariva pooled placebo-controlled trials of creatine, in people with or without depression, and searched four databases through February 2025 (PubMed).

Across 11 trials and 1,093 participants, the standardized mean difference was -0.34, with a 95% confidence interval of -0.68 to -0.00. That interval touches zero, so the result is borderline. The authors rated the quality of the evidence as very low.

They translated the effect to roughly 2.2 points on the 17-item Hamilton Depression Rating Scale. Their threshold for a clinically important change is 3.0 points.

The authors concluded that creatine may offer a small-to-moderate benefit, but the average effect was not clinically important and the true effect could be trivial or null.

A systematic review by Fares and colleagues covered randomized trials of creatine monohydrate in people with a diagnosed mental disorder and described the existing evidence as mixed (PMC). An excerpt reports that 2 of 17 creatine participants experienced hypomania or mania. We could not see which trial that came from, so treat it as a flag, not a rate.

A 2024 narrative review says creatine shows promise as an add-on treatment, but that the human data come from a limited number of small trials plus preclinical work (PMC).

Then there is food. An analysis of the 2022 Korean national nutrition survey looked at dietary creatine, not supplements, in 5,257 people aged 12 and up (PMC). Depression prevalence was 6.9% in the lowest-intake quartile versus 3.3%, 4.3% and 3.6% in the others. The lowest group also reported higher rates of suicidal thoughts, planning and attempts, according to the survey as summarized in the source.

What it does not show

It does not show that creatine treats depression. The pooled effect is small, borderline and graded very low certainty, and the trial-level evidence rests on a small number of studies.

The survey cannot show cause and effect. People who eat less creatine, mostly from meat and fish, may differ in diet quality, income or health in ways that also affect mood. The authors themselves say the findings need caution and validation.

The sleep deprivation and Alzheimer's studies are small and, as the explainer says, do not justify recommendations. We also have not traced those trials to their original papers, so we cannot vouch for their designs.

Trial-level details such as dose, or whether creatine was added to antidepressants, were not available to us. That matters for anyone deciding whether the results apply to them.

What it means for you

Do not swap creatine for therapy or medication. If you are being treated for depression or anxiety, the current data do not support replacing anything.

If you want to try it anyway, tell your prescriber first. That applies most if you have bipolar disorder, given the mania and hypomania signal in the Fares excerpt, or any kidney concern.

• A small effect at best, based on the pooled depression data.
• No established dose or duration for mental health purposes from the sources we reviewed.
• Judge it by how you feel and by what your clinician sees, not by the hype.

Context

The rationale is that creatine supports brain energy metabolism, neuron survival and neurotransmitter function. Much of that mechanistic support comes from animal models (PMC).

Medical Xpress also ran a July piece asking what five clinical trials show so far on creatine and depression (Medical Xpress). We could not read it in full.

On safety, a 2025 meta-analysis of creatine and kidney function found a small but statistically significant rise in serum creatinine across 12 studies (PubMed). We have not verified how the authors interpret it, so we are not drawing conclusions. It is one more reason to check with a clinician if kidney health is a concern.

Our searches turned up no major guideline recommending creatine for depression. That is an absence of results, not proof that none exists.