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October 19, 2026

Creatine After 50: What the Research Shows for Strength and Muscle

By The MDR Team · Editorial standards

Two small hand weights on an oak table beside a dish of white powder and a measuring scoop

In adults over 50 who do resistance training, adding creatine has produced larger gains in lean mass and strength than training alone, across more than 20 randomized trials. The average added gain is modest. The usual daily amount is 3 to 5 grams of creatine monohydrate, the form with the evidence behind it, and a loading phase is optional. Two side notes matter: a possible small rise in body weight, and a possible rise in blood creatinine that is not by itself a sign of kidney trouble.

Most of us lose some muscle and some strength as the decades go by, and many of us notice it in ordinary things: getting up from a low chair, carrying groceries in from the car, the last flight of stairs. Resistance exercise is the standard way to push back. The question people ask us is whether creatine adds anything to that, or whether it is a young man's gym supplement.

Creatine has been tested in older adults in more than 20 randomized trials, and the results are encouraging, with some limits worth knowing.

What creatine does

Creatine is a compound your body makes from three amino acids, about a gram a day, mostly in the liver and kidneys. You also get some from meat and fish. Nearly all of it ends up in muscle, where much of it is stored as phosphocreatine and used to regenerate ATP, the molecule muscle cells spend for energy during short, hard efforts like a set of squats (NIH Office of Dietary Supplements).

Taking creatine as a supplement can raise the amount stored in muscle by roughly 15 to 40 percent (Jäger and colleagues, 2011). That extra reserve can help you do a little more work in a training session, and over weeks, that extra work can add up.

What the trials in older adults found

The clearest picture comes from meta-analyses, which pool the randomized trials.

A 2017 meta-analysis gathered 22 randomized controlled trials with 721 men and women whose average ages ran from 57 to 70. Everyone did resistance training two or three days a week, for 7 to 52 weeks, and took either creatine or a placebo. The creatine groups gained about 1.4 kg (roughly 3 pounds) more lean tissue than the placebo groups, and made larger gains in chest press and leg press strength (Chilibeck and colleagues, 2017). The strength differences were small in statistical terms. Lean tissue here means everything that is not fat or bone, so it includes water held in muscle as well as new muscle protein.

An earlier analysis of 357 older adults, averaging about 12 weeks of training, found the same direction: more fat-free mass, more chest press and leg press strength, and a better score on a 30-second chair stand test, which is closer to daily life than a gym lift (Devries and Phillips, 2014). It found no added benefit on several other strength measures, such as knee extension and biceps curl, and the authors said the number of studies was limited.

Two qualifications.

First, nearly all of this is creatine plus training. The trials compare people who lift and take creatine with people who lift and take a placebo. If you are not doing any resistance exercise, this evidence does not tell you much.

Second, the strength results depend on how the trials dosed it. A 2021 update found that creatine improved lean mass and strength overall, but when the authors set aside studies that began with a high-dose loading week, the extra strength gains in chest press and leg press were no longer significant. The same analysis found that taking creatine only on training days still helped (Forbes and colleagues, 2021). Several researchers in this field disclose ties to creatine manufacturers. The trials are randomized and placebo-controlled, but it is fair for you to know that.

How much to take

The amount usually recommended is 3 to 5 grams a day, and a review of common questions by a group of creatine researchers, published in 2021 in the Journal of the International Society of Sports Nutrition, concludes that you do not need to "load" first (Antonio and colleagues, 2021).

Loading means taking about 20 grams a day for five or six days. It fills muscle stores faster. A classic study measured this directly with muscle biopsies: 20 grams a day for six days raised muscle creatine by about 20 percent, and 3 grams a day reached the same level in 28 days (Hultman and colleagues, 1996). So loading gets you there in a week, and a steady daily amount gets you there in about a month. The slower route is simpler, and it avoids large single doses: the same review notes that more than about 10 grams at once may upset the stomach (Antonio and colleagues, 2021).

Monohydrate or one of the newer forms?

Buy monohydrate. It is the form used in almost all of the research above, it is inexpensive, and reviews of the newer forms (creatine ethyl ester, buffered creatine, creatine salts and others) have found little to no evidence that any of them works better or is safer (Jäger and colleagues, 2011). That review put it plainly: monohydrate is the optimal choice (Antonio and colleagues, 2021).

Water weight

The scale may move a little. Studies of creatine during strength training have seen total body weight rise by 1 to 2 kg (about 2 to 4 pounds) in the first month, partly from water drawn into muscle cells (NIH Office of Dietary Supplements). Over longer periods, studies suggest body water stays in proportion to muscle, and creatine does not add fat (Antonio and colleagues, 2021). If you weigh yourself every morning, it helps to know this can happen.

Creatinine, kidney tests and your doctor

Your body turns creatine into creatinine, a waste product filtered by the kidneys. Doctors use blood creatinine to estimate kidney function, usually reported as eGFR. Taking creatine can raise blood creatinine a little. A 2026 meta-analysis of randomized trials found an average rise of about 0.13 mg/dL, with no statistically significant difference in urea or in eGFR between the creatine and control groups (Tsiaras and colleagues, 2026). The same review concluded that at recommended doses, creatine does not cause kidney damage in healthy people (Antonio and colleagues, 2021).

The practical point: a higher creatinine number on your lab report can look like a kidney problem when it is not one, and it can also hide one that is. Tell your doctor you take creatine before blood work, so the number is read with that in mind. And if you already have kidney disease, talk to your doctor before starting; the safety research was done mostly in healthy people.

What we don't know yet

  • Long-term trials. Most studies in older adults run weeks to a year. The kidney meta-analysis above called for trials longer than a year.
  • Creatine without exercise. Whether creatine helps older adults who do not train is much less clear.
  • Who responds. People vary. People who eat little or no meat start with lower muscle creatine and may respond more (NIH Office of Dietary Supplements), but individual results are hard to predict.
  • The brain. Creatine is also used by the brain, and that research is younger. We wrote about it separately in Creatine and the brain.

Common questions

Do I have to lift weights for creatine to help?

The evidence for strength and lean mass in older adults comes from trials that paired creatine with resistance training two or three times a week. Without training, the benefit is not well established.

Should I do a loading phase?

You don't have to. A steady 3 to 5 grams a day fills muscle stores in about four weeks. Loading only gets you there sooner.

Will creatine make me gain weight?

It may, a little at first: studies have seen about 2 to 4 pounds over the first month, partly water held in muscle. Trials have not found that creatine adds body fat.

Is creatine safe for my kidneys?

In healthy people at recommended doses, the research has not found kidney harm. It can raise blood creatinine slightly, which can make a kidney test look worse than it is, so tell your doctor you take it. If you have kidney disease, ask your doctor first.

Where PowerFactors fits

Each scoop of MDR PowerFactors has 5 grams of creatine monohydrate, the amount used in many of the trials above, along with 250 mg of NMN, 100 mg of magnesium from magnesium bisglycinate and 100 mg of collagen peptides. It is $59.95 for 25 servings, or $53.96 with Subscribe & Save, and the full label is on the PowerFactors report.

If creatine for your training is all you are after, plain creatine monohydrate gives you the same 5 grams of creatine for less, and we say so in Creatine and NMN together. PowerFactors is for people who want those ingredients in one scoop. For mixing and timing, see How to take creatine and NMN.

Last updated October 19, 2026.

Sources

  • Chilibeck PD, Kaviani M, Candow DG, Zello GA. Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis. Open Access J Sports Med. 2017;8:213-226. PubMed 29138605
  • Devries MC, Phillips SM. Creatine supplementation during resistance training in older adults: a meta-analysis. Med Sci Sports Exerc. 2014;46(6):1194-1203. PubMed 24576864
  • Forbes SC, Candow DG, Ostojic SM, Roberts MD, Chilibeck PD. Meta-analysis examining the importance of creatine ingestion strategies on lean tissue mass and strength in older adults. Nutrients. 2021;13(6):1912. PubMed 34199420
  • Antonio J, Candow DG, Forbes SC, et al. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr. 2021;18(1):13. PubMed 33557850
  • Hultman E, Söderlund K, Timmons JA, Cederblad G, Greenhaff PL. Muscle creatine loading in men. J Appl Physiol. 1996;81(1):232-237. PubMed 8828669
  • Jäger R, Purpura M, Shao A, Inoue T, Kreider RB. Analysis of the efficacy, safety, and regulatory status of novel forms of creatine. Amino Acids. 2011;40(5):1369-1383. PubMed 21424716
  • Tsiaras A, et al. The effect of creatine supplementation on kidney function: a systematic review and meta-analysis of randomized controlled trials. J Ren Nutr. 2026. PubMed 42035842
  • NIH Office of Dietary Supplements. Dietary Supplements for Exercise and Athletic Performance: Fact Sheet for Health Professionals (creatine section). ods.od.nih.gov

†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.