Does taking collagen supplements actually work against wrinkles?

Two large analyses covering dozens of double-blind, placebo-controlled studies together show that people who take hydrolysed collagen daily have fewer visible wrinkles after 8 to 16 weeks compared with people who took a placebo. Skin hydration and elasticity also improved significantly in several of these analyses. These are genuine clinical studies, not marketing stories.

At the same time, you should put the findings in perspective. Most participants were women, doses ranged from 2.5 to 10 grams per day, and the studies varied considerably in design and measurement methods. Larger, better-standardised studies are needed. A smaller study of 87 women using 5 grams per day for 16 weeks found no improvement in elasticity or hydration, while wrinkle severity and skin texture did improve. Adding hyaluronic acid on top of collagen provided no additional benefit in that study.

How collagen that you swallow reaches the skin has not yet been fully worked out. There are indications that collagen in the skin becomes denser and breaks down less after just four weeks of use, but whether that is caused entirely by the supplement itself or partly by accompanying substances such as vitamin C is not certain. There is also no established recommended dose.

An important qualification: what companies and social media promise consistently goes further than what the science shows. Claims such as 'wrinkles disappear' or 'skin rejuvenation' are not supported by the studies. The studies show statistically significant improvements, but not dramatic transformations. Reported side effects are minimal, but long-term safety data are lacking.