Optimal Plus F-PRO Collagen liquid collagen 500 mlHealthy bones and joints. Beauty from the inside. OPTIMAL Liquid Collagen with a unique composition supplements collagen in the human body . It contains carefully selected biologically active substances that ensure its absorption and support the beneficial effects in the human body. The key principle is that the collagen peptides contained in the preparation, after being absorbed into the human body, act as a trigger for the activation of the collagen