Quick answer

Women in trials have taken the same amounts as men, usually 3 to 5 g a day, sometimes after a loading week of about 20 g a day. Strength gains are clearest in women who also lift weights, though pooled results for women are smaller and less consistent than for men.^1,2,3,4

Key facts

Only 58 of 656 creatine studies, about 9%, enrolled women alone.⁵
Loading raised muscle creatine by about 19% in women, close to the rise seen in men.¹
In 7 trials of women after menopause (608 women), creatine with weight training added about 0.4 kg of lean mass and 7.5 kg on the leg press.⁴
No human trial has tested creatine supplements during pregnancy.^1,6

What trials in women found

Most creatine research has been done in men, and NIH notes that supplement studies often leave out women. The ISSN position stand reports benefits in both sexes, while noting that some studies found smaller gains in women. These are the graded claims, with the amounts studied:^7,8

Supports muscle strength during resistance training*^2,3,8

Strong evidence

A 2025 meta-analysis of 69 randomized trials (1,937 people) found that creatine plus resistance training added about 1.4 kg to bench or chest press and 5.6 kg to squat strength over placebo. Strength gains were seen at maintenance doses of 8 g a day or less and were clearest in younger adults, men and people who already train.

Amount studied: 3 to 8 g a day, with or without a loading phase

Supports gains in lean body mass when combined with resistance training*^3,8,9

Moderate evidence

A meta-analysis of 35 randomized trials (1,192 people) found that creatine added about 1.1 kg of lean body mass when combined with resistance training, and nothing measurable without exercise. Men gained about 1.5 kg; the gain in women (about 0.3 kg) was not statistically significant, and part of the early gain is water held in muscle, so the grade is moderate.

Amount studied: 3 to 5 g a day with resistance training, often after a loading phase

The 2025 pooled analysis split its results by sex. Women gained a little on the bench or chest press over placebo, about 0.15 kg across 12 trial groups, against 1.34 kg for men. On the leg press, squat, jumps and sprint cycling, the gains in women were not statistically significant, but each of those analyses had only 3 to 5 trials in women.²

Single trials show what is possible with training. Untrained women who lifted for 10 weeks while taking creatine gained 20 to 25% more leg strength than the placebo group, with no difference in body weight. College soccer players who took 15 g a day for a week, then 5 g a day for 12 weeks, gained more bench press and squat strength than players on placebo. Not every trial agrees: one 10-week trial in active women found no added effect.^1,3

Women over 40 and after menopause

A 2026 meta-analysis pooled 7 randomized trials in 608 women after menopause, average age about 62, lasting 12 to 104 weeks. Creatine added about 0.37 kg of lean mass and 7.5 kg on the leg press compared with placebo. The gains came at 5 g a day or more combined with weight training; trials of 3 g a day or less without training found no measurable effect.⁴

Bone density did not change overall. In one two-year trial without training, 1 g a day for a year and then 3 g a day for a second year did not change muscle or bone measures. For the years just before menopause, a 2025 review says data are still limited.^1,4,10

Many of these reviews were written by researchers who advise creatine makers, and the meta-analysis rated most trials as having some concerns about bias. One large preregistered trial was rated low risk.^1,4

How much women take

Women can follow the same amounts studied in men. A loading phase raised muscle creatine by about 19 percent in women, similar to men, and 5 g a day reached the same level in about 3 to 4 weeks.¹

Where studies set the amount by weight, loading meant 0.3 g per kg a day and the steady approach 0.03 to 0.1 g per kg. For a woman weighing 60 kg, that is about 18 g a day for a loading week, or 1.8 to 6 g a day.³

Will it make me gain weight?

A review of trials in women says quick weight gain during loading is more common in men. In a trial of college lacrosse players, both the creatine and the placebo groups gained about 0.5 kg. Across 29 studies of women, weight gain on creatine did not differ significantly from placebo.^1,5

Any early gain is mostly water drawn into muscle. If the scale matters to you, a steady 3 to 5 g a day without a loading week brings the slowest change.⁶

What's in ours

What’s in ours

Creatine: Creatine Monohydrate, 5,000 mg per serving, from the label
Creatine + Electrolytes: Creatine Monohydrate, 5,000 mg per serving, from the label

Pregnancy, breastfeeding and other cautions

Research on creatine in pregnancy so far is in animals. Reviews of creatine in women describe it as an area of interest, but no human trial has tested supplements during pregnancy. Ask your doctor before taking creatine if you are pregnant, trying to become pregnant or breastfeeding.^1,8

Across 29 studies that tracked side effects in 951 women, creatine did not raise total side effects, gut complaints, weight gain, or measures of kidney or liver function compared with placebo.⁵

The usual cautions apply too: ask first if you have kidney disease or reduced kidney function, take a medicine that affects the kidneys, or are under 18.

Questions people ask

Does creatine work for women over 50?

Pooled trials in women after menopause found modest gains, about 0.4 kg of lean mass and 7.5 kg on the leg press, when creatine at 5 g a day or more was paired with weight training. Trials of 3 g a day or less without training found no measurable effect.⁴

Will creatine make me bulky?

Not by itself. In one 10-week trial, untrained women who lifted weights gained 2.6 kg of fat-free mass on creatine against 1.6 kg on placebo. Most of that gain came with the training itself, since the placebo group gained too.¹

Is creatine safe during pregnancy?

That is not known. No human trial has tested creatine supplements in pregnancy, and the research so far is in animals. Ask your doctor before taking it if you are pregnant or breastfeeding.^1,6

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Sources

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.