Health hub

Midlife Strength: Creatine, Strength Training and Protein After 40, by the Evidence

Creatine added a little muscle and strength in postmenopausal women when paired with strength training, but it did not protect bone. Supervised heavy lifting raised spine bone density in women with low bone mass, and older adults need more protein than younger ones.

By Kymata Health editorial teamLast verified October 10, 2026

Medical review pending. Written by our editorial team from the studies and documents cited below; a credentialed clinician has not reviewed it yet. Educational only, not medical advice.

Key takeaways

  • In a 2026 meta-analysis of 7 trials (608 postmenopausal women), creatine added 0.37 kg of lean mass and 7.5 kg to leg-press strength vs placebo; the benefit showed up at 5 g a day or more combined with strength training [1].
  • Creatine at 3 g a day for 2 years, without a training program, did not improve bone density, lean mass or muscle function in 200 postmenopausal women with low bone mass [2].
  • In the LIFTMOR trial, 8 months of supervised twice-weekly heavy lifting and impact training raised lumbar spine bone density by 2.9% while it fell 1.2% with a low-intensity home program [3].
  • The PROT-AGE group recommends at least 1.0 to 1.2 g of protein per kg of body weight a day for people over 65, and 1.2 g or more for those who exercise [4].
  • Creatine slightly raises serum creatinine, a routine kidney blood test, without changing estimated kidney filtration (eGFR) in trials [5].

Guides in this hub

  1. Creatine for Women Over 40: What the Postmenopause Trials ShowCreatine with strength training added a small amount of muscle and leg strength in postmenopausal women. It did not raise bone density in two 2-year trials, and 3 g a day without training did nothing measurable.
  2. Heavy Lifting After Menopause: What the LIFTMOR Trial Found for BoneIn women with low bone mass, 8 months of supervised heavy lifting and impact training raised spine and hip bone density and caused no vertebral fractures. The WHO recommends muscle strengthening on 2 or more days a week.
  3. How Much Protein Do Women Need After 50? What the Evidence SaysExpert guidance for older adults sets protein at 1.0 to 1.2 g per kg of body weight a day, more if active. Protein supplements add a little muscle and strength to training, with less benefit as people get older.

Why strength matters in midlife

Menopause is accompanied by faster losses of muscle mass and strength and declining bone density [1]. Losses in physical function predict loss of independence, falls and even death in older people [4].

The World Health Organization recommends muscle-strengthening activity for every age group, alongside aerobic activity [6]. This hub covers three levers with trial evidence: strength training, enough protein and, as an add-on to training, creatine.

Creatine: what it does and does not do

Pooled trials in postmenopausal women show small gains in lean mass and leg strength when creatine is taken at 5 g a day or more with strength training; trials of 3 g a day or less without training showed no measurable effect, and bone density was unchanged overall [1].

The largest bone trial, 3 g a day for 2 years without a training program, found no benefit for bone, lean mass or function [2]. The meta-analysis authors disclosed ties to a creatine maker. Our creatine guide for women over 40 covers that, plus dose, bone and safety in detail.

Strength training for muscle and bone

In LIFTMOR, 101 women with low bone mass (average age 65) who did supervised heavy lifting and impact work twice a week improved spine and hip bone density and every measure of physical function compared with a home program [3].

Our guide to heavy lifting after menopause covers the trial, its safety findings and how much training the WHO recommends.

Protein after 50

Older adults need more dietary protein than younger adults because the body responds less to the protein it eats; people over 65 with acute or chronic illness may need 1.2 to 1.5 g per kg a day, but those with severe kidney disease not on dialysis may need to limit protein [4].

Our protein guide for women over 50 turns those numbers into daily amounts and covers what protein supplements add to training.

Partners we link to

Paid links: we earn a commission if you buy through these, at no extra cost to you. It never changes what the evidence sections say. Affiliate disclosure.

  • Supersmart 3-CreatinePaid linkA creatine blend, mostly creatine monohydrate, with 3 g of creatine per scoop ($29 for 250 g, checked Oct 10, 2026). The trials that found gains in postmenopausal women used at least 5 g a day alongside strength training. Affiliate code SMART026 takes 15% off (Supersmart's terms apply).See Supersmart 3-Creatine

Regulatory and legal notes

  • Creatine is sold as a dietary supplement. The FDA does not approve dietary supplements before they are marketed and does not test them before sale; manufacturers are responsible for their safety [7].
  • In November 2020 (in a letter it reissued on December 3, 2020 to correct a typo) the FDA said it had no questions about one manufacturer's conclusion that creatine monohydrate is generally recognized as safe (GRAS) as a food ingredient at 1.0 g of creatine per serving in products such as protein bars and drink mixes. The notice covered those food uses only; it is not an FDA approval of creatine supplements [8].
  • A supplement may not legally claim to treat, prevent or cure a disease; a product marketed that way is regulated as a drug [7].

References

  1. [1]Creatine monohydrate for lean mass, strength, and bone density in postmenopausal women: a systematic review and meta-analysis. J Int Soc Sports Nutr, 2026. PMID 42141930
  2. [2]Creatine Supplementation (3 g/d) and Bone Health in Older Women: A 2-Year, Randomized, Placebo-Controlled Trial. J Gerontol A Biol Sci Med Sci, 2020. PMID 31257405
  3. [3]High-Intensity Resistance and Impact Training Improves Bone Mineral Density and Physical Function in Postmenopausal Women With Osteopenia and Osteoporosis: The LIFTMOR Randomized Controlled Trial. J Bone Miner Res, 2018. PMID 28975661
  4. [4]Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. J Am Med Dir Assoc, 2013. PMID 23867520
  5. [5]The Effect of Creatine Supplementation on Kidney Function: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. J Ren Nutr, 2026. PMID 42035842
  6. [6]World Health Organization 2020 guidelines on physical activity and sedentary behaviour. Br J Sports Med, 2020. PMID 33239350
  7. [7]Questions and Answers on Dietary Supplements. U.S. Food and Drug Administration, 2026.
  8. [8]GRAS Notice GRN No. 931: Creatine monohydrate. U.S. Food and Drug Administration, 2020.

Dietary supplements are not intended to diagnose, treat, cure or prevent any disease, and these statements have not been evaluated by the FDA. Prescription options need a licensed clinician. Talk to your clinician or pharmacist before starting anything new, especially if you take prescription medicines, are pregnant or breastfeeding.

Keep reading: Supplements and vitamins

Supplements and vitamins: every page →Supplement & Nutrient Encyclopedia →Browse all topics →

Previous in this topicBlood Sugar Supplements vs Placebo: Berberine, Psyllium and ChromiumBerberine, psyllium and chromium lowered glucose in trials of people with type 2 diabetes.Next in this topicCreatine for Women Over 40: What the Postmenopause Trials ShowCreatine with strength training added a small amount of muscle and leg strength in postmenopausal women.How Much Protein Do Women Need After 50? What the Evidence SaysExpert guidance for older adults sets protein at 1.0 to 1.2 g per kg of body weight a day, more if active.PCOS (Now PMOS) and Irregular Cycles: Diagnosis, Treatment and Supplements, by the EvidencePCOS was renamed polyendocrine metabolic ovarian syndrome (PMOS) in 2026, but how it is diagnosed has not changed.How PCOS (PMOS) Is Diagnosed: Cycle Length, Androgens and the AMH TestPCOS, now called PMOS, is diagnosed with 2 of 3 features: irregular cycles, high androgens and polycystic ovaries.

Evidence-graded supplement stacks →