Study Reveals Collagen Supplements May Improve Skin Health and Reduce Signs of Aging

Skin aging is strongly linked to the gradual loss and degradation of collagen, a key structural protein that maintains skin firmness, elasticity, and hydration. Collagen accounts for nearly 30% of total body protein and is a major component of the extracellular matrix that supports skin cells.

A review in Food, Nutrition and Health examines what these compounds do for the skin, drawing on clinical studies to highlight both their potential and important limitations.

With aging, both intrinsic factors (natural aging) and extrinsic factors such as ultraviolet (UV) radiation accelerate collagen breakdown. This leads to reduced elasticity, dryness, wrinkles, and uneven pigmentation.

Collagen peptides, derived from the enzymatic breakdown of collagen, have gained attention as a dietary supplement for improving skin health. Due to their low molecular weight, these peptides are more easily absorbed in the body compared to native collagen.

Research suggests they may stimulate collagen production, enhance skin hydration, and improve elasticity. They are also believed to reduce oxidative stress and inhibit matrix metalloproteinases (MMPs), enzymes responsible for collagen degradation.

Preclinical and small clinical studies indicate that collagen peptides may support fibroblast activity, promote extracellular matrix repair, and increase the production of important skin components such as hyaluronic acid and elastin.

Some evidence also suggests protective effects against UV-induced damage and inflammation. However, results across studies are inconsistent, with variations in dosage, duration, and peptide sources.

Oral supplementation, typically at doses of 2.5–5 grams per day, shows the most consistent benefits, while topical applications remain less effective due to limited skin penetration. Despite promising findings, long-term safety data and large-scale human trials are still lacking.

Overall, collagen peptides offer potential as a supportive strategy for skin aging, but further robust research is needed to confirm their long-term effectiveness and optimal use.

REFERENCE: Chen, K., Ma., D., Yang, X., et al. (2026). The effects and mechanisms of collagen peptides for alleviating skin ageing. Food, Nutrition and Health. DOI: https://doi.org/10.1007/s44403-026-00046-3. https://link.springer.com/article/10.1007/s44403-026-00046-3