Collagen as a Bioactive Ingredient in Nutricosmetology: A Review
November 2025
in “
Quality in Sport
”
Studysummary This review found that hydrolyzed collagen supplementation, particularly marine collagen, improves skin hydration, elasticity, and density while strengthening hair and nails, especially when paired with vitamin C and trace elements; however, more studies are necessary to evaluate long-term efficacy across different sources and demographics. Our plain-language summary of this paper — not a Tressless recommendation.
This review highlights the effectiveness of collagen supplementation, particularly hydrolyzed collagen, in improving skin hydration, elasticity, and density, reducing wrinkles, and strengthening hair and nails. The supplementation, typically 2.5-10 g/day over 8-12 weeks, is most effective when combined with vitamin C and trace elements like zinc, copper, and manganese. Marine collagen is noted for its high bioavailability and safety. The review concludes that collagen supplementation supports regenerative and anti-aging processes by providing essential amino acids and stimulating fibroblast activity, though further research is needed to assess long-term efficacy across various collagen sources and demographic groups.
