What happened
The study, published 26 September 2026 and widely shared in October, randomised 64 sedentary adults aged 45 to 65 to 10 g a day of creatine or placebo for 12 weeks. Without exercise, the creatine group gained about 1.1 kg of lean tissue on a DXA scan and improved on leg press and bench press.
With exercise plus diet, creatine gained about 1.3 kg and lost more body-fat percentage than exercise plus placebo.
Why it matters
Creatine is cheap, well studied and widely used — and this is the first trial to show a gain without any exercise at all. But the groups were small, about 13 to 20 people each, and DXA counts water as lean tissue, so part of the 'muscle' may be water retention.
What comes next
The dose was 10 g, double the usual 3–5 g, and the exercise assignment was chosen by each participant, not randomised — only creatine versus placebo was randomised within each group. The cognitive findings are exploratory. This is not 'creatine replaces the gym': with exercise the results were better.
Exercise assignment was chosen by each participant, not randomised (only creatine vs placebo was randomised within each group); about 13–20 people per group; DXA counts water as lean tissue, so part of the gain may be water retention; 10 g dose is double the usual 3–5 g; cognitive findings are exploratory. Not 'creatine replaces the gym'.