Creatine for Perimenopause: Does It Help Sleep?

Creatine, perimenopause and sleep have been bouncing around social media since Dr Rhonda Patrick started posting about creatine trials in peri- and postmenopausal women. The sleep part of the story rests on a very small amount of data; other parts of the creatine story are on firmer ground. Here is what the studies actually found.

What did the perimenopause creatine study find?

The study most people are quoting was published in 2025 in the Journal of the International Society of Sports Nutrition by a team at St. Olaf College. Fifteen women took part, five perimenopausal and ten postmenopausal. Each took 5 g of creatine monohydrate every day and did a full-body strength session twice a week for 14 weeks.

What it found:

• Lower-body strength went up significantly across both groups.
• The perimenopausal women reported improved sleep quality (p = 0.018). The postmenopausal women did not.
• Estradiol levels did not change.

What it could not tell us is whether creatine caused any of that. There was no placebo group, so there is no way to separate the creatine from the strength training, from paying attention to sleep for 14 weeks, or from chance. Five women is also a very small group. The authors call it a quasi-experimental study, which is the right label: a reason to run a bigger trial, not a result to act on.

Is there any other evidence that creatine helps sleep?

A little, and it is narrower than it sounds.

A 2024 randomized, double-blind, placebo-controlled trial in Nutrients followed naturally menstruating women in their late teens and early twenties through six weeks of resistance training. Half took 5 g of creatine a day. Sleep was tracked with an Oura ring. The creatine group slept longer on the nights after a training session than the placebo group did. On non-training nights there was no difference, and overall sleep quality scores did not change. This is the study behind the “an hour more sleep” posts, and the detail that matters is that the extra sleep showed up only after exercise, in women decades younger than the perimenopausal reader.

There is also research on creatine and sleep deprivation, which is a different question. A 2024 crossover study of 15 adults in their twenties gave a single large dose (0.35 g per kilo, roughly 25 g for a 70 kg person) and found it reduced the decline in memory and processing speed during 21 hours awake. A 2026 follow-up in Nutrients with 29 adults found a smaller effect at 0.2 g per kilo. Those studies are about coping with a missed night, not sleeping better, and the lead author has warned against trying those doses at home.

So the honest summary is: one uncontrolled study with five perimenopausal women, one controlled trial in young women that found an effect only on training days, and some work on functioning without sleep. A 2025 review in the same sports nutrition journal put it plainly: data on perimenopausal women remains limited.

What does creatine do for women over 40 besides sleep?

This is where the evidence is more solid, and it is the better reason most women in this age group consider creatine.

Muscle and strength. The largest trial in postmenopausal women is a two-year randomized controlled trial of 237 women (average age 59) published in Medicine and Science in Sports and Exercise in 2023. Everyone did resistance training three days a week and walked six days a week; half took creatine. The creatine group gained more lean tissue and walked faster over 80 meters. Adverse events over two years were minimal.

Bone. The same trial was designed to test bone density, and creatine did not improve it at the hip, femoral neck or spine. It did improve some measures of bone geometry that may matter for hip fracture risk, but the headline bone result was a null.

Thinking and reaction time. The CONCRET-MENOPA trial, published in 2025 in the Journal of the American Nutrition Association, was an eight-week randomized, placebo-controlled trial of creatine hydrochloride in peri- and postmenopausal women. It reported higher brain creatine and faster reaction times on a medium dose. This is the study Dr Patrick highlighted, and it is a single short trial of a less common form, so interesting rather than settled.

A 2025 narrative review in the Journal of the International Society of Sports Nutrition covering creatine across women’s lives reached the same place: promising, with a clear need for larger and longer trials.

How much creatine should you take, and which kind?

The International Society of Sports Nutrition position stand is the standard reference. The usual maintenance dose is 3 to 5 g of creatine monohydrate a day. A loading phase (about 20 g a day split into doses for five to seven days) fills muscle stores faster but is optional; taking 3 to 5 g daily gets you to the same place in a few weeks.

Question	What the evidence supports
Which form	Creatine monohydrate. It is the form in nearly every trial and the cheapest.
How much	3 to 5 g a day. Smaller women can use the lower end.
When	Any time. Consistency matters more than timing.
With what	Water or any drink. Taking it with a meal is fine.
Loading	Optional. Not needed for the uses above.

Creatine hydrochloride, the form in the CONCRET-MENOPA trial, is sold at lower doses on the claim that it absorbs better. One trial does not make it the better choice, and monohydrate has decades of safety data behind it.

Is creatine safe, and who should check with a doctor first?

For healthy adults, creatine is one of the most studied supplements there is. The ISSN position stand reports that short and long term use, up to 30 g a day for five years in some studies, has been well tolerated in healthy people, and that there is no compelling evidence of harm to kidney function in healthy individuals.

There are still people who should talk to a doctor before starting:

• Anyone with a kidney condition, or diabetes that affects the kidneys. The safety data is in healthy kidneys. Creatine is cleared by the kidneys and the reassurance does not automatically extend to someone whose function is already reduced.
• Anyone on medication cleared by the kidneys, or having kidney blood tests. Creatine raises serum creatinine, which is the marker doctors use to estimate kidney function. That can make a routine blood test look worse than your kidneys are. Tell your doctor you take it.
• Anyone pregnant or breastfeeding. Research is active in this area, but it is a conversation for your doctor, not a supplement aisle.

Two mild effects are common in the first weeks: a small gain on the scales from water held in muscle, and stomach upset at higher single doses, which sticking to 3 g usually sorts. Choose a product that has been independently tested, since supplements are not checked before sale the way medicines are.

Does creatine replace the basics for perimenopause sleep?

No, and this is the part the viral posts leave out. The women in the 2025 study were also strength training twice a week, and the 2024 trial only found extra sleep on training nights. If there is a sleep effect, it may depend on the exercise as much as the powder.

The things with a longer track record for broken sleep in perimenopause are unglamorous: alcohol earlier or out, caffeine stopped by early afternoon, dinner regular and not too late, and the 3am waking pattern dealt with rather than fed. We cover the food side in what to eat and avoid before bed in perimenopause, and the reasons behind 3am waking in their own article.

Common questions

Does creatine help you sleep?

The evidence is early. One uncontrolled study found better self-reported sleep quality in five perimenopausal women, and one placebo-controlled trial in young women found more sleep only after resistance training. Neither is enough to call creatine a sleep aid.

How much creatine should a perimenopausal woman take?

The standard dose across trials is 3 to 5 g of creatine monohydrate a day. The 2025 perimenopause study used 5 g. There is no evidence that more helps for sleep, and higher single doses are more likely to upset your stomach.

Does creatine cause weight gain in women?

It commonly adds a small amount of water weight inside muscle in the first few weeks, often under a kilo. In the two-year postmenopausal trial the creatine group gained more lean tissue, not fat.

Is creatine bad for your kidneys?

Not in healthy adults, according to the ISSN position stand. It does raise serum creatinine, which can confuse a kidney blood test, and anyone with existing kidney disease should ask a doctor before taking it.

Does creatine change hormone levels in perimenopause?

The 2025 study measured estradiol and found no change over 14 weeks. Creatine is not a hormone and does not act like one.

The bottom line

Creatine has good evidence for strength and lean muscle in women over 40, a single interesting trial on brain creatine and reaction time, and only a sliver of evidence on sleep, all of it small and most of it tied to exercise. At 3 to 5 g of monohydrate a day it is generally safe for healthy adults, and worth a conversation with your doctor if your kidneys are a question. Treat the sleep claim as a hypothesis, not a reason to buy.

Related reading: the menopause and food guide, does magnesium help menopause sleep?, why do I wake at 3am and want to eat? and why you keep waking between 2am and 4am.

Nothing here diagnoses anything or replaces medical advice. Talk to your doctor or a dietitian before starting a supplement, especially alongside other medication.