Creatine: what the evidence actually supports

The evidence does not support treating creatine as a miracle powder. It supports a narrower, more useful conclusion: creatine monohydrate can improve capacity for repeated high-intensity work and can add to some resistance-training adaptations.

Body composition: a real signal with a measurement caveat

A 2024 systematic review and meta-analysis of 12 studies in adults younger than 50 found that adding creatine to resistance training increased measured lean body mass by 1.14 kg versus resistance training alone. It also reported small reductions in body-fat percentage and fat mass. Because creatine changes intracellular water, measured lean mass cannot be read as pure contractile-muscle gain.

Older adults: strength is clearer than function

A 2026 three-level meta-analysis of 11 randomized trials in adults aged 60 and above found a small additional strength benefit when creatine was combined with resistance training (g=0.31; moderate certainty). Pooled effects on muscle mass and physical function were not statistically significant and were graded low or very-low certainty. The authors warned against extrapolating directly to frail, sarcopenic or functionally limited older adults.

Safety: do not collapse “studied” into “safe for everyone”

A 2026 systematic review of randomized trials found no difference in urea or estimated glomerular filtration rate between creatine and control groups, while calling for trials extending beyond one year. A separate 2025 analysis covering 685 creatine trials found no overall difference in participant-reported side-effect frequency versus placebo.

Those are reassuring signals for studied populations, mostly using creatine monohydrate. They do not establish safety for contaminated or multi-ingredient products, undisclosed doses, pregnancy, children, or people with kidney disease or other clinical constraints. The 2025 safety paper also disclosed multiple supplement-industry relationships; its scale is useful, but the conflicts belong in the interpretation.

Practical audit translation

Creatine remains its own product class. The audit questions are form, disclosed quantity, independent quality testing, unnecessary ingredients, claims and cost—scored separately. “Advanced creatine matrix” is not an evidence grade. No brand or seller has paid for this review, and there are no affiliate links on this page.