What is the evidence for creatine in women?

What the evidence says

Creatine is a natural substance your muscles use for quick bursts of energy. Supplements give you more than food alone provides. Most creatine research has been done in men, but a growing number of studies now look specifically at women.

For building strength, the evidence is fairly encouraging. A review of ten clinical trials in older women found that taking creatine alongside strength training increased upper-body strength, and the benefit was strongest in programs lasting 24 weeks or longer. Another review in premenopausal women found creatine plus resistance training improved muscle strength and body composition.

For athletic performance on its own, the picture is less clear. A review of 27 studies in physically active women found only a minority showed real improvements in strength, power, speed, or endurance tests compared to a placebo, so more benefit shows up when creatine is paired with structured training rather than used alone.

Safety looks solid. A systematic review focused only on women found no deaths or serious problems across 29 studies monitoring for side effects, and no signs of harm to the kidneys, liver, gut, or heart. In Canada, creatine monohydrate is licensed by Health Canada as a natural health product for improving strength and power during short, intense activity, which reflects this same safety and effectiveness picture.

There is also early interest in creatine for bone health after menopause. A two-year Canadian randomized trial in postmenopausal women found no change in bone density, but did find some improvements in bone shape and thickness in the hip that could theoretically lower fracture risk. This is one trial, so it needs to be confirmed by more research before drawing firm conclusions.