Creatine benefits: what the research does and doesn't show

The evidence doesn't support creatine as a uniform benefit for everyone who takes it. Its most consistent effect — strength and power gain — shows up mainly when it's paired with resistance training, and even that effect came out smaller or not statistically significant in the trials that specifically studied older adults and women.

What the evidence doesn't support

It doesn't support creatine as a stand-alone strength or muscle booster without a training program behind it: the lean-mass gains in the research below only showed up when creatine was combined with resistance training, not with other exercise types or no exercise at all. It doesn't support an equal effect across ages and sexes — several of the largest analyses found real gains in younger, male samples and smaller or non-significant gains in older adults and women on the same measures. It doesn't support creatine as a general cognitive enhancer: memory and processing speed improved in the research, but overall cognitive function and executive function did not. And it doesn't support creatine as a fat-loss or weight-loss tool; the weight changes reported in this literature are lean tissue and water, not fat loss.

What the trials found

The largest and most recent analysis, a 2025 meta-analysis pooling 69 randomized trials (1,937 participants), found creatine plus resistance training produced small but statistically significant improvements in bench/chest press strength, squat strength, vertical jump height and cycling peak power compared with placebo. Two measures showed no significant overall improvement: handgrip strength and leg press strength. Broken out by subgroup, the strength and power gains held up in younger adults and in males; older adults and females showed smaller or non-significant changes on several of the same measures. The authors specifically called for more trials in women and older adults to clarify how those groups actually respond.

A separate 2022 meta-analysis of 35 trials (1,192 participants) looked at lean body mass specifically and found the same pattern: creatine combined with resistance training increased lean body mass by about 1.1 kg regardless of age, but creatine combined with other exercise types, or with no exercise, showed no significant effect. By sex, men gained about 1.46 kg of lean body mass on creatine; the increase in women (0.29 kg) wasn't statistically significant.

Older adults get their own body of research, and it's more encouraging than the general age-subgroup findings above. A meta-analysis of 22 trials (721 participants, mean age 57-70) found creatine plus resistance training increased lean tissue mass and both chest press and leg press strength, over programs lasting 7 to 52 weeks. A meta-analysis focused specifically on older women (10 trials, 211 participants) found a significant upper-body strength benefit overall, but no significant effect on lower-body strength or muscle mass — unless the training program ran 24 weeks or longer, at which point both measures improved. Duration, in other words, mattered more than the supplement alone.

On cognition, a 2024 meta-analysis of 16 trials (492 participants, ages 20.8-76.4) found creatine monohydrate improved memory (moderate certainty) and processing speed and attention measures (low certainty), but found no significant improvement in overall cognitive function or executive function. Benefits were more pronounced in people with an existing disease, in the 18-60 age range, and in women — the opposite pattern from the strength research, where women's results were generally smaller.

One narrative review discusses creatine and women's health beyond strength training, including a hypothesis that supplementation may ease fatigue tied to the menstrual cycle. That's a narrative review describing an emerging research direction, not a systematic review of controlled trials, and it doesn't establish a dose or an effect size the way the meta-analyses above do — worth knowing about, not worth treating as settled.

Outcome	Population	What the trials found
Bench/chest press, squat strength, jump/power	Mixed adults, resistance training	Small, significant improvement
Handgrip and leg press strength	Mixed adults, resistance training	No significant overall improvement
Lean body mass	With resistance training	+1.1 kg, significant
Lean body mass	With no exercise or mixed exercise	No significant effect
Lean body mass, by sex	Men vs. women	+1.46 kg (men, significant) vs. +0.29 kg (women, not significant)
Strength and lean tissue mass	Older adults, resistance training	Significant gains, 7-52 weeks
Upper vs. lower-body strength	Older women specifically	Upper-body significant; lower-body and muscle mass only at 24+ weeks
Memory, processing speed	Adults, ages 20.8-76.4	Significant improvement
Overall cognition, executive function	Same population	No significant improvement

Questions people ask

What is creatine good for?

The most consistent effect across the research above is strength and power gain when creatine is combined with a resistance training program — not a supplement-alone effect. Muscle mass gains follow the same pattern. Memory and processing speed showed smaller, more mixed improvements; overall cognitive function and executive function did not improve significantly in the same research.

Is creatine good for you?

This page is about performance and cognitive outcomes, not general safety — see creatine side effects and who should not take creatine for that question specifically.

What does creatine do for women?

The strength and lean-mass research above found smaller or non-significant effects in women compared with men on several measures, though a dedicated meta-analysis in older women found a real upper-body strength benefit, especially in programs lasting 24 weeks or more. A separate narrative review raises the possibility of easing menstrual-cycle-related fatigue, but that's an emerging hypothesis from a non-systematic review, not an established, dose-tested effect.

What does creatine do for men?

The subgroup findings above were generally larger and more consistently significant in men than in women, across strength, power and lean body mass measures. That's a difference in the pooled trial data, not a claim that creatine works only for men.

Does creatine help with muscle growth?

Only alongside resistance training in the research above. Creatine combined with other exercise types, or with no exercise at all, did not produce a significant lean-mass increase in the largest pooled analysis on the topic.

Does creatine help you lose weight or burn fat?

No. Weight changes reported in this research are lean tissue mass and water, not fat loss, and no trial in this review measured fat loss as a creatine effect.

Does creatine improve brain function or memory?

A 2024 meta-analysis found a significant improvement in memory and in processing-speed measures, but no significant improvement in overall cognitive function or executive function — a narrower finding than "improves brain function" as a general claim.

When to talk to a doctor

Creatine is not a treatment for muscle-wasting, a cognitive disorder, or any diagnosed disease, and nothing in the research above supports using it as a substitute for medical evaluation or care. If you have a diagnosed health condition, take prescription medication, or are looking for something to address a diagnosed muscle or cognitive issue, talk to a doctor first.

Related reading: what is creatine? a plain guide and how much creatine should you take a day?.