Creatine monohydrate is one of the best-studied and safest supplements available, safe at studied doses including up to 30 g/day for 5 years in the general population.

In postmenopausal women specifically, creatine combined with resistance training produced small but real gains in lean mass, about 0.37 kg, and leg-press strength, about 7.5 kg, across a meta-analysis of 7 randomized trials; benefits required at least 5 g/day plus training, while 3 g/day without training showed no effect. The bone claim is more mixed: one 12-month trial found creatine slowed bone loss at the hip, but the largest, longest trial, 2 years with 237 women, found no bone density benefit at any site, only some improved bone geometry and faster walking. Creatine can support muscle when paired with lifting; treat bone claims cautiously.

What to know about this answer

Field messaging sometimes states flatly that creatine builds bone, but the largest and longest trial in postmenopausal women found no bone density benefit at any site, while the muscle and strength benefit is much better supported.

What the research shows, and which source each finding rests on

Short- and long-term creatine monohydrate supplementation, including up to 30 g/day for 5 years in studies, is safe and well tolerated in healthy individuals across ages

A[1]

Across 7 RCTs of 608 postmenopausal women, creatine plus resistance training produced lean mass gains of 0.37 kg (95% CI 0.05 to 0.69) and leg-press 1RM gains of 7.5 kg; benefits required at least 5 g/day with training, while 3 g/day or less without training showed no effect, and bone density was unchanged overall

A[2]

A 12-month RCT (n=47) found creatine attenuated femoral neck bone loss (-1.2% vs -3.9% with training alone), but the larger 2-year follow-up RCT (n=237) found no bone density benefit at any site, only improved femoral neck geometric properties and faster walking speed

B[3]B[4]

Where the real disagreement is

Each position is shown with its own sources. A position listed here is not necessarily the accepted view.

Creatine helps preserve bone

Some clinicians citing the earlier 12-month trial

A 12-month RCT found creatine plus resistance training slowed femoral neck bone loss compared with training alone, a protective signal that matters for a demographic losing bone.

B[3]

The bone claim did not hold up in the best trial

The largest, longest trial in this population

The 2-year, 237-woman follow-up RCT, the largest and longest trial done, found no bone mineral density benefit at any measured site, only some bone geometry measures and walking speed improved. The accurate version of a creatine-and-bone claim is that it may preserve some bone geometry with long-term training, not that it preserves bone mineral density.

B[4]

What would settle it: Further large, long-duration RCTs of creatine plus resistance training with bone mineral density as a primary endpoint, since the two existing trials disagree.

What is really going on here

  1. Is a specific bone claim about creatine coming from the 12-month trial that showed benefit, or the larger 2-year trial that did not?
  2. Am I taking creatine specifically for muscle and strength evidence, or for bone claims that are less well supported?
  3. Is the person making the claim also selling a creatine product?

Questions for your doctor

  1. Is creatine reasonable for me given my kidney function and any medications I take?
  2. What dose and timing make sense if I'm also doing resistance training?
  3. Should I expect a small amount of water-weight gain, and is that something to be concerned about?
  4. Should my bone density be tracked separately if I start creatine, rather than assuming it protects bone?

Questions with no answer yet

Does creatine actually protect bone density in postmenopausal women, or only bone geometry?

Studied and negative

What is known: A 12-month trial (n=47) found creatine attenuated femoral neck bone loss, but the larger, longer 2-year trial (n=237) found no bone density benefit at any site, only some geometric measures and faster walking.

What would test it: Further large, long-duration RCTs of creatine plus resistance training with bone mineral density as the primary endpoint, since the two existing trials disagree.

Does creatine's muscle benefit hold in perimenopausal women specifically, or only in the postmenopausal women who were actually studied?

Not directly studied yet

No research does not mean it does not work, and it does not mean it works. It means nobody has tested it yet.

What is known: The meta-analysis behind the muscle and strength findings (7 RCTs, 608 women) enrolled postmenopausal women; no equivalent trial has been conducted in perimenopausal women.

What would test it: A dedicated RCT of creatine plus resistance training in perimenopausal women with lean mass and strength endpoints.

Below the 5 g/day-with-training threshold that showed benefit, is there truly no effect of creatine, or has a lower-dose, no-training scenario simply not been tested enough to know?

Partly studied

What is known: The meta-analysis found 3 g/day or less without resistance training showed no measurable effect, while benefits required at least 5 g/day combined with training - a directly tested comparison, but only at those two specific dose-and-training combinations.

What would test it: A dose-ranging trial testing intermediate doses and training loads to map where the effect actually starts.

Sources

  1. 1.International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine.Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr 2017;14:18. · Systematic review or guideline
  2. 2.Creatine monohydrate for lean mass, strength, and bone density in postmenopausal women: a systematic review and meta-analysis.Naddafha S, Antonio J, Kreider RB, Stout JR. Creatine monohydrate for lean mass, strength, and bone density in postmenopausal women: a systematic review and meta-analysis. J Int Soc Sports Nutr 2026;23(1):2668435. · Systematic review or guideline
  3. 3.Effects of Creatine and Resistance Training on Bone Health in Postmenopausal Women.Chilibeck PD, Candow DG, Landeryou T, Kaviani M, Paus-Jenssen L. Effects of Creatine and Resistance Training on Bone Health in Postmenopausal Women. Med Sci Sports Exerc 2015;47(8):1587-95. · Randomised trial
  4. 4.A 2-yr Randomized Controlled Trial on Creatine Supplementation during Exercise for Postmenopausal Bone Health.Chilibeck PD, Candow DG, Gordon JJ, et al. A 2-yr Randomized Controlled Trial on Creatine Supplementation during Exercise for Postmenopausal Bone Health. Med Sci Sports Exerc 2023;55(10):1750-1760. · Randomised trial

The letter grades the type of study behind a claim, not the answer itself.

This page is general information based on published research and public sources. It is not medical advice and not a personal assessment, and it does not replace a conversation with your doctor. Peritale is a wellness product, not a medical device, and is not intended to diagnose, treat, cure or prevent any disease. For any medical question, speak with a licensed clinician.

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