Collagen is main protein in human body, account for 30% of protein in human body, more than 70% of collagen in skin, and over 80% is collagen in dermis. Therefore, it is a kind of structural protein in extracellular matrix in living organisms, and play an important role in cell reproduction, as well as closely related to cell differentiation and cell aging.
Dr. Brandt, the father of collagen in the world: All causes of aging come from the loss of collagen.
After the age of 20, the skin thickness decreased by 7% in every ten years, and women loss 30% of their collagen within five years after menopause, then loss 1.13% year by year.