The problem lies in its production slowing down with age, which is why many turn to dietary supplements to make up for the deficiency. A new study reviewed research published until March 2025, drawing on 16 systematic reviews that collectively included nearly 8,000 participants. The overall picture was cautiously positive, as described by the science website 'Science Alert'. Taking collagen supplements was linked to moderate improvements in muscle health and pain relief in arthritis patients. An improvement in skin elasticity and hydration was also noted, although these benefits accumulated gradually, suggesting that taking collagen regularly over a long period is more important than short-term use. Some results were less clear. Combining all these different products in one analysis might hide a lot of information instead of revealing it. Individual differences are also of great importance. It seems that there are real, albeit modest, benefits, especially for skin hydration, joint pain relief, and muscle health support. Collagen supplements have become one of the top-selling products in the health and wellness industry, promising a host of benefits, from smoother skin to stronger joints. Some are derived from animals like cattle, pigs, and poultry, while others come from marine sources like fish, jellyfish, and shellfish. There are also 'plant-based' alternatives to collagen. The way collagen is processed also affects the size and composition of the peptides in the final product, which in turn affects how it is absorbed and interacts in the body. Factors such as sun exposure, smoking, sleep quality, environment, and hormone levels all influence how the skin ages and how it responds to dietary supplements. This review adds to a growing body of evidence suggesting that collagen supplements are not just expensive placebos. It gives skin its structure and elasticity, supports bones and muscles, helps wounds heal, and plays a role in protecting organs. But are they really effective? A comprehensive new review of the evidence, which gathered data from 113 clinical trials, suggests that the answer, for at least some health outcomes, is probably yes. But, as is always the case in nutrition, the full picture is more complicated. Collagen is a protein that the body naturally produces. Results for skin elasticity and hydration varied depending on when the studies were conducted, with more recent research showing less improvement in elasticity but greater hydration. Part of the problem lies in the vast variation between collagen supplements.
