Creatine Supplementation for Healthy Ageing

Key Takeaways

Creatine helps buffer cellular energy through the creatine–phosphocreatine system; this mechanism is relevant to muscle contraction but is not itself evidence of slower ageing. [1]
In older adults undertaking resistance training, meta-analyses report modest additional gains in lean tissue mass and some measures of strength compared with training alone. [2] [3]
Evidence for benefit without resistance training is less consistent, and increases in measured lean mass should not automatically be interpreted as greater functional capacity. [4] [5]
Evidence for cognition is promising but limited and heterogeneous; evidence does not establish prevention of dementia or cognitive decline. [6] [7]
Trials have not shown that creatine extends human lifespan, and longer-term evidence on fractures, disability, and other clinical endpoints remains insufficient. [4] [8]

Who This Is Useful For

This page is for readers assessing creatine as a healthy-ageing intervention. It separates effects on short-term physiological and performance measures from evidence on function, disease, and longevity, and distinguishes creatine taken alongside resistance training from creatine used alone. [2] [4]

What Creatine Supplementation Means

Creatine is synthesized in the body and also obtained from foods. Most is stored in skeletal muscle as free creatine or phosphocreatine. Creatine kinase transfers phosphate between phosphocreatine and adenosine diphosphate, helping replenish adenosine triphosphate during rapidly changing energy demand. Creatine monohydrate is the form used in most intervention research. [1]

Studies vary in dose, use of an initial loading phase, duration, diet, training programme, baseline muscle status, and participant health. Results from one protocol therefore do not describe a single uniform intervention effect. [2] [3]

Evidence at a Glance

Evidence Domain	Main Finding	What It Supports	Main Limitation
Muscle with resistance training	Meta-analyses report greater gains in lean tissue and some strength tests than resistance training alone. [2] [3]	A modest additive effect in studied training settings.	Small trials, differing protocols, and outcome heterogeneity limit precision.
Creatine without training	One- and two-year trials in postmenopausal women found no added benefit for lean mass or muscle function. [4] [5]	Creatine alone should not be assumed to reproduce training-associated findings.	These trials studied women with osteopenia and specific low-dose regimens.
Cognition	A meta-analysis found improved memory, with a larger but heterogeneous estimate in older subgroups. [6]	A hypothesis for further trials.	Few older-adult trials and no demonstrated dementia-prevention effect.
Bone	A two-year trial found no improvement in bone mineral density, microarchitecture, falls, or fractures. [4]	No established bone-protective effect from creatine alone.	Falls and fractures were not frequent enough to establish clinical efficacy.
Kidney markers	A synthesis found a small rise in serum creatinine but no significant difference in measured or estimated filtration outcomes. [9]	Common studied regimens have not shown impaired filtration in trial populations.	Long-term and kidney-disease evidence remains limited.
Longevity	No randomized trial evidence demonstrates longer human life. [2] [4]	Muscle findings cannot be converted into a lifespan claim.	Existing trials were designed around surrogate or functional outcomes.

Muscle Mass, Strength, and Resistance Training

A meta-analysis of 22 trials involving 721 participants found that adding creatine to resistance training produced a mean 1.37-kilogram greater increase in lean tissue mass and small additional improvements in chest-press and leg-press strength. Participants' mean ages across studies ranged from 57 to 70 years, and programmes lasted 7 to 52 weeks. [2]

An updated analysis likewise found greater lean-tissue and strength gains overall, but subgroup results varied with dosing and loading strategies. Such variation makes it difficult to identify one optimal regimen and reduces confidence that the average effect applies equally across sexes, ages, training histories, and clinical populations. [3]

Lean Mass Is Not the Same as Function

Creatine increases intracellular water as muscle creatine stores rise, so an early change in body mass or dual-energy X-ray absorptiometry lean mass is not necessarily new contractile protein. Over longer training studies, greater strength and lean-tissue changes may occur together, but they remain separate outcomes. [1] [2]

Evidence from supplementation alone is less supportive. In 200 postmenopausal women with osteopenia, 3 grams per day for two years did not improve lean mass or muscle function compared with placebo. A separate one-year study using 1 gram per day also found no improvement in lean mass, timed stands, or timed up-and-go performance. [4] [5]

Cognition and Brain Energy

The brain also uses the creatine–phosphocreatine system, providing a plausible reason to test creatine in cognitive research. Plausibility does not determine whether supplementation produces a meaningful or durable cognitive effect. [1] [6]

A meta-analysis of eight randomized trials found a small overall improvement in memory and a larger estimate in adults aged 66 to 76 years, but heterogeneity in that older subgroup was high. A later review focused on adults aged 55 years or older found only two double-blind supplementation studies among six eligible studies and judged the overall evidence limited. These findings do not establish prevention or treatment of dementia. [6] [7]

Bone Health, Falls, and Clinical Outcomes

Muscle and bone loading provide a rationale for studying creatine alongside exercise, and a one-year resistance-training trial reported changes in selected tibial bone-area measures. It did not establish fewer fractures. [8]

In the larger two-year trial of postmenopausal women with osteopenia, creatine alone did not improve bone mineral density or microarchitecture and did not change falls or fractures. Current evidence therefore does not support treating intermediate bone measurements as proof of fracture prevention. [4] [8]

Safety and Kidney-Test Interpretation

Creatine is partly converted to creatinine. Supplementation can therefore raise serum creatinine, a marker commonly used to estimate kidney filtration, without necessarily reducing filtration itself. A 2025 systematic review and meta-analysis found a small increase in serum creatinine but no significant change in glomerular filtration rate. [9]

This evidence is reassuring for the studied doses, durations, and populations, but it does not prove universal safety. Many trials are short, exclude people with important kidney disease, and are not powered to detect rare harms. The two-year osteopenia trial reported no effect on health-related laboratory measures, while broader safety reviews emphasize that clinical context still matters. [4] [9] [10]

Evidence Quality and Interpretation

Confidence is moderate that creatine can add modestly to gains in lean tissue and selected strength measures when combined with supervised resistance training in generally healthy older adults. Multiple meta-analyses point in the same direction, although they aggregate small, heterogeneous studies. [2] [3]

Confidence is lower for independent effects on everyday physical function, cognition, bone outcomes, and long-term clinical events. Confidence is very low that creatine slows biological ageing or extends life, because those questions have not been tested directly in suitable human trials. [4] [6] [7] [8]

What This Does Not Mean

It does not mean a change in lean mass demonstrates less frailty, fewer falls, or longer life. [2] [4]
It does not mean creatine can substitute for resistance training; the more consistent evidence concerns their combination. [2] [5]
It does not mean an increase in serum creatinine automatically represents kidney injury, or that kidney risk can be dismissed in every clinical context. [9]
It does not mean preliminary memory findings demonstrate prevention of cognitive decline or dementia. [6] [7]

Practical Interpretation Examples

If a study reports more lean mass: check whether strength and physical-function outcomes also changed, and whether the measurement could include altered tissue water. [1] [2]
If creatine and training outperform training alone: interpret the result as an additive effect under that protocol, not evidence that creatine alone produces the same outcome. [2] [4]
If serum creatinine rises: consider that creatine metabolism can affect the marker and that kidney assessment may require clinical context beyond a creatinine-based estimate. [9]
If a claim uses “healthy ageing”: identify whether the measured outcome was strength, cognition, bone density, disability, disease incidence, survival, or only a biomarker. [2] [6] [8]

References

Bonilla, D. A., et al. (2021). Metabolic basis of creatine in health and disease: A bioinformatics-assisted review. Nutrients. https://pubmed.ncbi.nlm.nih.gov/33572884/
Chilibeck, P. D., et al. (2017). Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: A meta-analysis. Open Access Journal of Sports Medicine. https://pubmed.ncbi.nlm.nih.gov/29138605/
Forbes, S. C., et al. (2021). Meta-analysis examining the importance of creatine ingestion strategies on lean tissue mass and strength in older adults. Nutrients. https://pubmed.ncbi.nlm.nih.gov/34199420/
Sales, L. P., et al. (2020). Creatine supplementation (3 g/d) and bone health in older women: A 2-year, randomized, placebo-controlled trial. Journals of Gerontology: Series A. https://pubmed.ncbi.nlm.nih.gov/31257405/
Lobo, D. M., et al. (2015). Effects of long-term low-dose dietary creatine supplementation in older women. Experimental Gerontology. https://pubmed.ncbi.nlm.nih.gov/26192975/
Prokopidis, K., et al. (2023). Effects of creatine supplementation on memory in healthy individuals: A systematic review and meta-analysis of randomized controlled trials. Nutrition Reviews. https://pubmed.ncbi.nlm.nih.gov/35984306/
Marshall, S., et al. (2026). Creatine and cognition in aging: A systematic review of evidence in older adults. Nutrition Reviews. https://pubmed.ncbi.nlm.nih.gov/40971619/
Candow, D. G., et al. (2021). Efficacy of creatine supplementation and resistance training on area and density of bone and muscle in older adults. Medicine & Science in Sports & Exercise. https://pubmed.ncbi.nlm.nih.gov/34107512/
Kabiri Naeini, E., et al. (2025). Effect of creatine supplementation on kidney function: A systematic review and meta-analysis. BMC Nephrology. https://pubmed.ncbi.nlm.nih.gov/41199218/
Kreider, R. B., et al. (2017). International Society of Sports Nutrition position stand: Safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition. https://pubmed.ncbi.nlm.nih.gov/28615996/

Educational Disclaimer

This page summarizes research and does not provide individualized medical advice. Supplement safety, interpretation of kidney tests, and the relevance of study findings depend on health conditions, medicines, diet, dose, product composition, and clinical context.