What does creatine actually do for muscle, brain, and sleep?

881. Bodybuilders have been taking creatine for decades, and its effects on strength and muscle mass are well established. Lately it's also being sold for brain health, better sleep, and menopause. The evidence on those newer claims is a lot thinner, but it isn't nothing.

Creatine is stored mostly in your muscles, where it powers short bursts of high-intensity effort. Your body makes some of it, and you get the rest from meat and fish, which is why vegans tend to run lower. Stores also decline with age as muscle mass drops.

Monica walks through what the research actually shows, including her own experiment with creatine supplementation:

Why creatine doesn't build muscle directly, and what it does insteadThe 2 to 5 pounds of water weight most people gain in the first few weeks, and why it isn't the kind you'd notice in your jeansWhat a 2025 meta-analysis found about creatine, resistance training, and strength in adults over 50, and why the training group eventually caught upThe sleep-deprivation studies, where a single large dose measurably improved memory and processing speed for up to nine hoursWhy women may respond differently than menWhat the cognition research in older adults does and doesn't supportWhether creatine is hard on your kidneys, and what that creatinine bump on your bloodwork really meansLoading doses versus starting straight at maintenance

New to Nutrition Diva? Check out our special Spotify playlist for a collection of the best episodes curated by our team and Monica herself!

Follow Nutrition Diva on Facebook and subscribe to the newsletter for more diet and nutrition tips.

Find out about Monica's keynotes and other programs at WellnessWorksHere.com

Nutrition Diva is a part of the Quick and Dirty Tips podcast network.

References

Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation | Scientific Reports

Single-Dose Creatine Reduces Sleep Deprivation-Induced Deterioration in Cognitive Performance

Creatine and Cognition in Aging: A Systematic Review of Evidence in Older Adults | Nutrition Reviews | Oxford Academic