Collagen supplements, marketed as a remedy for ageing skin, painful muscles and aching joints, have become a booming industry predicted to be worth £5.85bn by 2027. However, a TV doctor has warned that these products lack robust scientific backing, with most research funded by the cosmetics industry itself.
Collagen is the most abundant protein in the human body, comprising nearly a third of all proteins. It provides structure to skin, bones, cartilage and tendons, and plays a role in cell signalling and repair. Production peaks in early adulthood and declines from around age 20-30, contributing to wrinkles, stiffness and frailty.
While anecdotal reports from influencers such as Jennifer Aniston and Kate Hudson claim benefits for skin, hair and nails, independent evidence is scarce. Dr Gary Goldenberg, assistant clinical professor of dermatology at the Icahn School of Medicine, initially dismissed collagen supplements as a scam but later found some evidence they may improve skin tone, texture and elasticity.
However, he cautions that not all products deliver on their promises. Regulators like the US Food and Drug Administration do not review supplements for safety or effectiveness before sale, and concerns have been raised about contamination in some collagen products. The doctor advises consumers to be wary of marketing claims and to seek independent advice.
