Collagen pills are everywhere now. They are advertised for smoother skin, stronger joints, and better workouts. A new, very large study looked at all the research to see which claims are true.
The study was printed in the Aesthetic Surgery Journal Open Forum. It combined 16 big reviews, 113 controlled trials, and data from almost 8,000 people worldwide. The scientists found clear benefits for skin and osteoarthritis, but not for athletic performance.
Largest Collagen Review Yet
Researchers from Anglia Ruskin University led the work. They say this is the first time all the major health areas linked to collagen have been examined together in one big analysis.
Looking at many studies helped them see patterns. People who took collagen for a longer time saw better skin hydration and elasticity. They also felt less pain and stiffness if they had osteoarthritis.
Skin Health and Aging
Besides skin and joints, collagen showed small improvements in muscle size, muscle shape, and tendon health. These modest gains suggest collagen could support healthy aging, but the changes are not dramatic.
Little Proof for Sports Gains
Even though ads target athletes, the review found almost no evidence that collagen makes workouts easier or speeds recovery.
Unclear Effects on Metabolism and Teeth
The team also checked studies on heart‑related measures (like cholesterol and blood pressure) and on oral health. The results were mixed or weak, so collagen does not seem to have a strong impact there.
Newer trials sometimes showed stronger results, possibly because of better collagen formulas and improved study designs.
More Research Needed
One researcher said, “Collagen isn’t a miracle cure, but regular use can help skin and osteoarthritis. We still need more high‑quality trials to find the best doses, long‑term effects, and differences between types of collagen.”
The study was a joint effort by Professor Smith of Anglia Ruskin University and Dr. Roshan Ravindran of KLNIK.