The short version: A 2026 systematic review in Brain Medicine gathered every randomized controlled trial ever run on creatine for depression. It found five trials — 238 people in total. Two showed a clear benefit, and both were in women. Three showed nothing at all. The authors’ verdict is that creatine is “a promising lead rather than a proven remedy.” That is a more honest summary of this field than either the enthusiasm or the dismissal you will find elsewhere.

We have covered the individual mood research before. This review is worth its own article because it is the first time the whole evidence base has been assembled and graded in one place — including the trials that failed.

What the review actually did

Fares and colleagues searched the literature for randomized controlled trials testing creatine supplementation in people with a diagnosed depressive disorder. Five trials met the bar, reported across six published papers, run in South Korea, the United States, Brazil, Israel and India.

The combined sample was small: 238 participants at baseline, 126 assigned to creatine and 112 to placebo. Average age was around 36. The sample skewed heavily female. Four trials studied major depressive disorder; one studied depressive episodes in bipolar disorder. Doses were mostly 5 g per day, with one trial testing up to 10 g. Follow-up generally ran to eight weeks.

Two hundred and thirty-eight people across five studies is not a large evidence base. For comparison, a single phase III antidepressant trial routinely enrolls more participants than the entire literature on creatine for depression. That context matters for everything that follows.

Why anyone tested creatine for depression in the first place

The rationale is bioenergetic, not nutritional. The brain is roughly 2% of body weight but consumes about 20% of the body’s resting energy. Running that requires a constant supply of ATP, and the phosphocreatine system is the brain’s fastest way to regenerate it.

Brain imaging studies have repeatedly found altered creatine and ATP dynamics in people with mood disorders. If depression involves a shortfall in cellular energy production, topping up the buffer that regenerates ATP is a reasonable thing to test. The review also notes that creatine appears to interact with dopamine and serotonin signalling, which offers a second possible route to an effect.

This is a genuine mechanistic hypothesis with imaging evidence behind it. It is also, so far, a hypothesis that the clinical trials have only half supported.

The two trials that worked

Creatine added to an SSRI. In women with major depressive disorder taking escitalopram, adding 5 g of creatine daily produced a significantly greater fall in Hamilton Depression Rating Scale scores than placebo, with a Cohen’s d of 1.13. More women in the creatine group reached remission by week eight. An effect size above 1.0 is large by any conventional standard.

Creatine added to therapy. A separate trial pairing creatine with cognitive behavioural therapy found a steeper decline in depressive symptoms than therapy plus placebo.

The common thread is that in both, creatine was an add-on. Nobody has tested creatine for depression as a standalone treatment, and nothing in this review should be read as suggesting it works that way.

The three that didn’t

This is the part that usually gets left out of popular coverage of creatine for depression.

Treatment-resistant depression: no benefit over placebo, at doses of 5 g and 10 g per day. If the bioenergetic mechanism were straightforwardly true, a higher dose in a harder-to-treat group is exactly where you would hope to see something.

Adolescent girls: no difference from placebo.

Bipolar depression: no advantage over placebo — and two participants developed hypomania or mania during the trial. Creatine was otherwise well tolerated across the literature, but this specific signal is the one worth taking seriously.

The sex-difference thread

Both positive trials enrolled only women. That is the single most interesting pattern in the review, and it has two possible explanations that are hard to tell apart with this little data.

The interesting explanation: creatine genuinely works differently by sex. The review points to rodent work showing that creatine alters depression-like behaviour in a sex-dependent manner, which would fit.

The boring explanation: with five small trials, two of which happened to be women-only, this could be coincidence dressed up as a pattern. The review’s authors flag the unbalanced sex distribution as a limitation of the evidence, not as a finding.

Both readings are live. The pattern is real enough to be worth testing directly, and thin enough that it should not yet be described as an established sex difference. This is the same caution that runs through the broader women’s health literature on creatine.

How solid is the evidence?

The reviewers assessed each trial for risk of bias. Two came out at low risk. Three raised concerns, largely around how participants were assigned to groups and how the data were handled.

Add that to the small samples, the short eight-week windows, the varied populations and the skewed sex distribution, and the conclusion writes itself: the findings cannot yet be generalized. The authors call for larger, longer, more rigorous trials before creatine for depression changes anything in clinical practice.

What this means if you take creatine

Creatine is not a treatment for depression. Creatine for depression has only ever been studied as an inexpensive, well-tolerated addition to established care. If you are depressed, the interventions with strong evidence are therapy, medication, or both, from a qualified provider.

If you have bipolar disorder, this review contains a specific warning. Two participants in the bipolar trial developed hypomania or mania. That is a small number in a small trial, but it is a plausible enough signal that adding creatine without telling your prescriber is not a good idea.

The dose studied is the ordinary dose. The trials that found a benefit used 5 g per day — the same amount used for muscle, bone and cognition, at the top of the standard 3–5 g range. Nobody needs to take more for mood reasons; the one trial that went to 10 g found nothing.

Set expectations at the level of the evidence. If you take creatine for training or bone health and notice your mood feels a little steadier, that is consistent with what has been observed. Expecting a supplement to resolve a mood disorder is not.

Frequently asked questions

Does creatine for depression actually work? Not reliably, on the evidence so far. Two of the five randomized trials found a benefit and three found none, and the review concluded the case is promising but not persuasive.

Why did the women-only trials do better? Nobody knows yet. It may reflect a real sex-dependent effect, supported by animal data, or it may be chance in a small evidence base. The review treats it as a question, not an answer.

What dose did the successful trials use? 5 g per day of creatine monohydrate, added to existing treatment, over eight weeks.

Is creatine safe to take alongside antidepressants? It was generally well tolerated across these trials, and creatine has a strong overall safety record. That is not the same as clearance for your situation. Your prescriber should know everything you take.

Can I take creatine instead of my antidepressant? No. Every trial in this review tested creatine added to treatment, never in place of it. Do not change prescribed medication without your prescriber.

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If you are struggling with your mental health, please reach out to a healthcare provider or a trusted person in your life. A supplement is not a substitute for support, and support is worth asking for.

Read next

• Creatine and mood in women: the landmark trial in detail
• Creatine and brain fog: the sleep deprivation research
• Creatine across the female lifespan: the 2025 review
• The master research summary: everything the evidence says about creatine for women

New to creatine? Start with our complete creatine guide for women.

Sources

1. Fares BJ, Zhou C, Fabiano N, Wong S. Creatine as a treatment for depression. Brain Medicine. 2026. doi:10.61373/bm026l.0039. Read the review
2. Lyoo IK, Yoon S, Kim TS, et al. A randomized, double-blind placebo-controlled trial of oral creatine monohydrate augmentation for enhanced response to a selective serotonin reuptake inhibitor in women with major depressive disorder. American Journal of Psychiatry. 2012;169(9):937-945. PubMed
3. Toniolo RA, Silva M, Fernandes FBF, et al. A randomized, double-blind, placebo-controlled, proof-of-concept trial of creatine monohydrate as adjunctive treatment for bipolar depression. Journal of Neural Transmission. 2018;125(2):247-257. PMC

Educational information only. This article summarizes published research and is not medical advice, and creatine is not a treatment for any mental health condition. Talk to your healthcare provider before adding any supplement to a treatment plan.