Creatine for perimenopause: what the evidence actually shows

Why creatine matters more in perimenopause

Creatine is a compound your body makes and stores mostly in muscle, where it helps regenerate the fuel your cells burn during short bursts of effort. Declining estrogen in perimenopause is linked to faster loss of muscle mass and strength, so anything that supports resistance training gains gets more attention at this stage of life.

Falling estrogen also appears to lower natural creatine stores somewhat, which is part of why researchers started testing supplementation specifically in perimenopausal and postmenopausal women rather than assuming results from younger male athletes would carry over.

What the trials actually found

A 2025 systematic review and meta-analysis of postmenopausal women found that creatine, at doses of 5 grams a day or more combined with resistance training, produced small but real gains: on average about 0.37 kg more lean mass and roughly 7.5 kg more leg-press strength than training without creatine. Lower doses without resistance training showed no measurable effect, which matters: creatine is not a stand-alone strength drug, it amplifies training.

A smaller 2025 study in the Journal of the International Society of Sports Nutrition followed 15 women (a mix of perimenopausal and postmenopausal, average age 54) who took 5 g of creatine monohydrate daily with two supervised resistance sessions a week for 14 weeks. They saw meaningful lower-body strength gains, better sleep quality in the perimenopausal subgroup, favorable body composition changes, and modest cognitive improvements. It was a small, single-site trial with no placebo group, so treat it as promising rather than definitive.

The brain fog and reaction-time signal

The most specific data point is CONCRET-MENOPA, a randomized, double-blind, placebo-controlled trial of 36 perimenopausal and menopausal women published in 2025 in the Journal of the American Nutrition Association. A medium dose of creatine hydrochloride (1,500 mg/day) outperformed placebo on reaction time and raised frontal brain creatine levels measured on imaging, and it showed a possible edge on mood swing severity, though that result did not reach statistical significance.

This is one trial, using a different creatine form (hydrochloride, not monohydrate) at a lower dose than the strength studies. It is a real and encouraging signal for cognition, not proof that creatine treats brain fog. If brain fog is your main concern, see our full guide on brain fog for the broader picture of causes and options.

Who it helps most, and who can skip it

Creatine is most worth trying if you already do or plan to do resistance training and want to protect strength and muscle through the transition. It is a reasonable, low-risk add-on if brain fog or fatigue are bothering you, though expectations should stay modest.

It is not a substitute for addressing sleep, hormone status, or other causes of fatigue and brain fog, and it will not touch hot flashes or mood swings in any meaningful way based on current evidence.

Dosing and safety

Most of the strength evidence uses creatine monohydrate at 3-5 g/day, taken any time of day, with no loading phase required for most people. A large safety review found no increase in serious adverse events, kidney or liver problems, or excess weight gain from creatine monohydrate use in women.

• Typical dose: 3-5 g/day creatine monohydrate, ongoing (not a course you stop after a few weeks).
• No loading phase needed - skipping it also reduces early water retention.
• Take with food or a shake if it causes mild stomach upset; stay hydrated.
• Check with your doctor first if you have existing kidney disease.

The bloating and 'water weight' myth

Creatine does pull extra water into muscle cells (intracellular water), which can show up as 1-2 pounds on the scale in the first week or two. That is water stored inside the muscle, not the puffy, under-the-skin bloating people picture, and it is not fat gain. It typically settles once your muscle creatine stores fill up.

If you notice visible bloating rather than a small scale bump, a lower daily dose, splitting the dose, or switching to micronized monohydrate usually resolves it.