Research has shown drinking Peptan collagen increases Hydroxyproline carrying di peptides in the blood. These di peptides are bioavailable and lead to many benefits.[1]

Clinical reports have demonstrated that oral collagen peptide supplements can reduce the signs of skin aging by improving skin hydration [2,3,4,5] elasticity [3,4] and dermal collagen density [2].

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[1] Kleinnijenhuis, A.J., 2019. Non-targeted and targeted analysis of collagen hydrolysates during
the course of digestion and absorption. Analytical and Bioanalytical Chem. 2019 Dec 24. doi: 10.1007/s00216-019-02323-x.

[2] Asserin, J et al. The effect or oral collagen peptide supplementation on skin moisture and the dermal collagen network: evidence from an ex vivo model and randomized, placebo-controlled clinical trials. J of Cosmetic Derm. 2015; 1-11

[3] Matsumoto H et al Clinical effects of fish type I collagen hydrolysate on skin properties. ITE Letters on Batteries, New Tech. & Medicine 2006; 7 (4): 386-390

[4] Ohara H et al Improvement in the moisture content of the stratum corneum following 4 weeks of collagen hydrolysate ingestion. Food Science and Technology Research 2009; 56 (3): 137-145

[5] Inoue N et al Ingestion of bioactive collagen hydrolysates enhance facial skin moisture and elasticity and reduce facial ageing signs in a randomized, double-blind, placebo-controlled clinical study. J Sci Food Agric 2016; 96(12): 4077-81