You have probably heard creatine described as the go-to supplement in the weight room. Most people assume it only works if you are also lifting weights. New research suggests that story may be incomplete.
Adults aged 45 to 65 who took 10 grams of creatine daily for 12 weeks gained lean tissue and got stronger, even when they followed no structured exercise program.
That is the finding of a trial published in September 2026 in the Journal of the International Society of Sports Nutrition.
What the trial actually tested
The Texas A&M team recruited 64 sedentary but healthy adults, with a mean age of 55. All were randomly assigned to either creatine monohydrate or a look-alike placebo, taken as two 5-gram sachets a day.
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Participants could opt in to a supervised exercise and diet program. 26 of them chose not to, leaving a group who kept their usual lifestyle and simply added the supplement or placebo to it.
In that non-exercising group, creatine users still added around 2.4 pounds of lean tissue over the 12 weeks. Their leg press and bench press scores also improved. The placebo arm barely moved.
Those who combined creatine with exercise gained close to 3 pounds of lean tissue and lost more body fat than exercisers on placebo, according to a summary in ScienceAlert.
Blood markers and memory scores moved too
The researchers also tracked blood work and cognition. In the creatine groups, they reported small favorable shifts in blood lipids and in HbA1c, a measure of average blood sugar over the previous two to three months.
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Selected cognitive and memory test scores also nudged up.
The authors are careful to describe these secondary results as exploratory. That signals something worth studying further, not a settled effect.
How much creatine and where it comes from
The dose used was 10 grams a day, higher than the 3 to 5 grams often used in older sports studies.
Richard Kreider, professor and director of the Exercise and Sport Nutrition Lab at Texas A&M, has put that in food terms. You would need to eat around five to ten pounds of meat or fish daily to reach the same amount from diet alone.
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Creatine is a compound the body makes in small amounts and stores mostly in muscle, where it helps power short bursts of effort. In supplement form, creatine monohydrate is the most studied version.
Earlier research from the same lab has pointed to muscle strength benefits in older adults as well.
What the trial does and doesn't say
The findings do not turn creatine into a substitute for exercise.
Those who combined it with training and a diet plan saw the bigger gains in strength, endurance and fat loss.
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In sedentary middle-aged adults, though, a daily dose still moved lean tissue and strength scores in a helpful direction.
The trial ran for only 12 weeks, so it does not answer questions about longer-term safety in this age group or about effects at lower doses.
People on medications, especially those affecting the kidneys, should talk to their doctor before adding any new supplement.
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This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.