Is It Legit?
Supported
“creatine improves muscle strength”
Educational, not medical advice. Always consult a qualified healthcare provider before changing your diet, supplements, or routine. Full disclaimer.
What the science says
Creatine supplementation increases muscle strength in adults when combined with resistance training (structured weightlifting or similar strength exercise), a finding backed by multiple large reviews that pool data from many trials. A 2024 review covering adults under 50 found consistent gains in both upper- and lower-body strength, with men tending to see larger improvements than women. The effect holds across age groups and is one of creatine's most consistently supported benefits.
Full analysis
Three lines of evidence back this claim. A 2024 meta-analysis (a study pooling results from many trials) of adults under 50 doing resistance training found consistent increases in both upper- and lower-body strength, generally larger in men than women. A 2017 position stand from the International Society of Sports Nutrition, a body that reviews the sports-supplement research, reached the same conclusion. A third review of healthy populations reported the same pattern of increased maximum strength and power.
This is about as strong as evidence gets for a supplement claim: a recent pooled analysis, a formal expert position statement, and a supporting review, all pointing the same direction.
The evidence covers people already doing resistance training - it says little about strength gains from creatine alone, without exercise. A sex difference in the size of the benefit is noted but not explained here.
The takeaway: for adults who lift weights or do similar resistance exercise, creatine is one of the more reliably supported ways to add strength on top of training.
Key studies
The 3 studies that carry the verdict, out of 10 reviewed.
[1]Effects of Creatine Supplementation and Resistance Training on Muscle Strength Gains in Adults <50 Years of Age: A Systematic Review and Meta-Analysis.
Wang Z, Qiu B, Li R, et al. · Nutrients · 2024
Pooling data from adults under 50, this review found that creatine plus resistance training increased both upper-body and lower-body strength, with larger gains typically seen in men than women.
View paper[2]International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine.
Kreider RB, Kalman DS, Antonio J, et al. · Journal of the International Society of Sports Nutrition · 2017
This expert position statement concluded that creatine consistently improves performance in short, intense bursts of exercise and increases the strength gained from training.
View paper[3]Creatine for Exercise and Sports Performance, with Recovery Considerations for Healthy Populations.
Wax B, Kerksick CM, Jagim AR, et al. · Nutrients · 2021
This review found that creatine consistently increased maximum strength, maximum work output and power output in healthy people.
View paper