Received: 24 September 2019
Revised: 5 November 2019
Accepted: 3 December 2019
First Online: 24 December 2019
Compliance with ethical standards
: The serum collection was carried out following the rules of the Declaration of Helsinki. The human experiment was approved by the French Ethical Committee [Comité de Protection des Personnes (CPP17048 / N° IDRCB: 2017-A02543–50) of Saint-Germain-en-Laye - Ile de France XI]. The volunteers were informed of the objectives of the study and the potential risks of ingestion of collagen hydrolysate, such as diarrhea and abdominal pain. All volunteers provided an informed consent.
: Janne Prawitt and Barbara Vanhoecke are employees of Rousselot. Anne J. Kleinnijenhuis, Frédérique L. van Holthoon, Annet J.H. Maathuis, Fabien Wauquier, and Yohann Wittrant declare that they have no conflict of interest.