Creatine after 40: muscle, women's health and the brain
Creatine monohydrate is the most studied ingredient we sell. Here is what the trials show for aging muscle, for women in perimenopause and menopause, and for memory, with a separate grade for each claim.
Muscle and strength as you age
This is the strongest part of the evidence. In a meta-analysis of 22 randomized trials in older adults, adding creatine to resistance training produced greater gains in lean tissue and in upper and lower body strength than training alone [2]. The usual intake is 3 to 5 g a day; a loading phase is optional [1].
Caveat: The benefit comes with training. Creatine without resistance exercise does much less.
Women 40 and over, through perimenopause and menopause
Women tend to have lower creatine stores than men, and a review of the research across the female lifespan describes creatine with resistance training as supporting muscle strength and lean mass after menopause [3]. The largest long trial is honest about limits: two years of creatine with training in 237 postmenopausal women did not improve bone mineral density compared with placebo [4].
Caveat: Most trials are small, and many combine creatine with supervised training. Grade B, not A, for this group specifically.
Memory and the brain
The brain uses creatine too. A systematic review of randomized trials in healthy people found possible benefits for short-term memory and reasoning [5], and a 2023 meta-analysis found improved memory, with a larger effect in adults aged 66 to 76 [6].
Caveat: Trials are short and small, and results vary between studies. Promising, not proven: grade C.
Safety and common myths
Creatine monohydrate has a long safety record in healthy adults at 3 to 5 g a day [1]. Reviews of the evidence do not support common worries such as kidney damage in healthy people, dehydration or cramping, and note that it is not only for young men or bodybuilders [7].
Caveat: Talk to your clinician first if you have kidney disease, are pregnant or nursing, or take medication. Not for people under 18.
Creatine monohydrate, 5 g a day, is the first item in Foundation. See Foundation · Full evidence summary
* 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.
Sources
- Kreider RB et al. ISSN position stand: safety and efficacy of creatine. J Int Soc Sports Nutr. 2017;14:18. doi.org/10.1186/s12970-017-0173-z
- Chilibeck PD et al. Creatine during resistance training in older adults: meta-analysis of 22 RCTs. Open Access J Sports Med. 2017;8:213-226. doi.org/10.2147/OAJSM.S123529
- Smith-Ryan AE et al. Creatine supplementation in women's health: a lifespan perspective. Nutrients. 2021;13(3):877. doi.org/10.3390/nu13030877
- Chilibeck PD et al. A 2-yr randomized controlled trial on creatine supplementation during exercise for postmenopausal bone health. Med Sci Sports Exerc. 2023. doi.org/10.1249/MSS.0000000000003202
- Avgerinos KI et al. Creatine and cognitive function in healthy individuals: systematic review of RCTs. Exp Gerontol. 2018;108:166-173. doi.org/10.1016/j.exger.2018.04.013
- Prokopidis K et al. Creatine and memory in healthy individuals: systematic review and meta-analysis. Nutr Rev. 2023;81(4):416-427. doi.org/10.1093/nutrit/nuac064
- Antonio J et al. Common questions and misconceptions about creatine supplementation. J Int Soc Sports Nutr. 2021;18:13. doi.org/10.1186/s12970-021-00412-w