Medical use of hydrolyzed collagen in osteoporosis

In this narrative review, the scientific background of the use of collagen in osteoporosis is presented, drawing inspiration for a discussion on the food supplements use in medicine. The first part of the paper provides an overview on collagen and hydrolyzed collagen. The second part deals with collagen carential disease, comprising conditions ranging from nail fragility to osteoporosis. The third part focuses on osteoporosis and its treatment, the fourth on hydrolyzed collagen. The medical use of hydrolyzed collagen provides a typical example of “Green economy”, the new alliance between man and nature that is involving medicine too.