The short answer: For muscle, the case is reasonably good. In randomized trials of adults with mean ages of 57 to 70, creatine monohydrate plus resistance training added about 1.37 kg more lean tissue mass than training alone. For the brain, the evidence is thinner: small gains on memory tests, and no randomized trial in dementia. Creatine is cheap and well tolerated, but it adds to training rather than replacing it.
What does creatine actually do in the body?
Creatine is a compound your body makes from amino acids, and you also get it from meat and fish. Most of it is stored in skeletal muscle as phosphocreatine. Phosphocreatine recycles ATP during short, hard efforts. That is why creatine helps with sets of heavy lifting rather than with a long walk.
The brain runs on the same energy buffer, which is the reason researchers started testing creatine for cognition. The International Society of Sports Nutrition position stand reports that short and long term supplementation, up to 30 g/day for 5 years, was safe and well tolerated in groups ranging from infants to older adults. That paper also describes habitual dietary creatine intake of roughly 3 g/day.
Does creatine plus lifting build more muscle after 60?
This is the strongest part of the evidence. A meta-analysis of 22 randomized trials pooled 721 participants with mean ages of 57 to 70. All of them trained 2 to 3 days per week for 7 to 52 weeks. The creatine groups gained 1.37 kg more lean tissue mass (95% CI 0.97 to 1.76), plus small advantages in chest press strength (SMD 0.35) and leg press strength (SMD 0.24).
A newer 2025 meta-analysis of 8 trials in 482 older adults found smaller effects. Creatine plus training beat training alone for lower limb strength (SMD 0.29) and lean tissue mass (SMD 0.27), but not for upper limb strength. Benefits were clearest in programs lasting 32 weeks or less.
How you take it appears to matter. A 2021 meta-analysis of ingestion strategies found that once trials using a loading phase (20 g/day or more for 5 to 7 days) were excluded, creatine no longer beat placebo on chest press or leg press strength. Taking creatine only on training days still improved lean tissue mass and strength.
So the gain is real, and it is modest. It sits on top of the training effect. If you are not lifting yet, the lifting is the intervention. Strength tracks closely with everyday function, which is why grip strength predicts so much about health.
Does creatine do anything without resistance training?
Less than the marketing implies, and part of the early change is water. A 2025 randomized trial gave 5 g/day for a 7 day wash-in with no training. The creatine group gained 0.51 kg more lean body mass on DXA than controls. Both groups then trained for 12 weeks and both gained about 2 kg, with no difference between them. The authors read the early jump as a measurement effect of creatine on body water.
A 2026 trial in 64 adults aged 45 to 65 reported that 2 x 5 g/day raised lean tissue mass, strength, and muscular endurance even in the group that did not exercise or diet. Participants chose their intervention arm, and the authors labelled the cognitive and biomarker findings exploratory, so this is suggestive rather than settled.
Across a much larger pool, a dose-response meta-analysis of 143 trials found creatine raised fat-free mass by 0.82 kg and cut body fat percentage by 0.28 points. The effects were more robust when supplementation was combined with resistance training.
Does creatine help memory and thinking in older adults?
This evidence is early and contested. A 2023 meta-analysis of 8 trials found a small overall improvement in memory (SMD 0.29), with a much larger effect in adults aged 66 to 76 (SMD 0.88, 95% CI 0.22 to 1.55). That paper then drew a published letter arguing that double-counting in the statistics produced a false positive result. The authors replied in the same journal. Treat the size of that older-adult number with caution.
A 2024 meta-analysis of 16 trials in 492 adults found significant effects on memory (SMD 0.31), attention time, and processing speed, but no effect on overall cognitive function or executive function. Using GRADE, the authors rated certainty as moderate for memory and low for everything else.
For dementia specifically, a 2026 scoping review screened 8,317 records and found six eligible studies: one in vitro, four animal studies, and one human pilot trial of 20 people. It found no randomized controlled trials at all. The pilot used 20 g/day for 8 weeks and raised brain total creatine by 11%. That is a case for running trials, not evidence of protection. For brain health, the better supported lever is still movement, as covered in exercise for brain health.
Is creatine safe for the kidneys?
The kidney worry largely comes from a lab artifact. Creatine breaks down into creatinine, which is the marker labs use to estimate kidney function. A 2026 meta-analysis of 26 studies in 1,036 people found creatine raised serum creatinine by 0.14 mg/dL and lowered creatinine-based GFR by 10.75 mL/min. When filtration was measured directly with Cr-EDTA instead, there was no significant change. Urea, albuminuria, and proteinuria did not change either.
A separate 2026 meta-analysis of 19 randomized trials in the Journal of Renal Nutrition found the same pattern: serum creatinine up 0.13 mg/dL, with no change in urea or eGFR. Both author groups note that trials running beyond one year are still scarce.
Two practical points follow. Tell your clinician you take creatine before any kidney panel, so a higher creatinine is not misread as decline. And if you have chronic kidney disease, are on dialysis, or take medicines cleared by the kidney, ask before starting.
How do you pick a creatine product in the US?
Creatine is sold as a dietary supplement, not a drug. The FDA states that firms are responsible for evaluating the safety and labeling of their products before marketing, and that FDA can act against an adulterated or misbranded supplement only after it reaches the market. There is no premarket approval. Purity is the manufacturer's claim until an independent lab checks it.
The product data argue for a narrow choice. An analysis of 175 creatine products sold on Amazon identified 16 forms of creatine other than monohydrate. It classified roughly 88% of the alternative-form products as having limited or no evidence for bioavailability, efficacy, and safety. Only 8% of all products carried third party certification. Monohydrate-only products averaged $0.12 per gram, while other forms averaged $0.26 per gram.
The practical read: buy plain creatine monohydrate, prefer a product with third party testing, and skip proprietary blends. For more on how to read a supplement label, see supplements.md. Food still comes first, and creatine is no substitute for getting enough daily protein.
The bottom line
If you are over 60 and already lifting 2 to 3 times a week, creatine monohydrate is one of the few supplements with randomized evidence behind it. Expect roughly a kilogram of extra lean tissue and a small strength edge over months, not a transformation. The cognition case is plausible and unproven, with no randomized dementia trial yet. The kidney signal in the blood is a measurement effect, not injury, in healthy people. Ask your clinician first if you have kidney disease, and buy monohydrate that someone else has tested.
Last updated: September 2026. This article is for informational purposes only and does not constitute medical advice. Talk with your clinician before starting creatine, especially if you have kidney disease, take prescription medicines, or are due for blood work.