Collagen is essential for skin, hair, and nails, as well as healthy bones and joints. But from the age of 21, collagen decreases by 1% per year. By the age of 30, the signs become visible. For years, scientists have searched for a method to give the human body the ability to regenerate its own collagen. It took the historic discovery of ch-osa® to make it a reality. Its ability to generate collagen with your own DNA imprint makes ch-osa the real breakthrough in collagen.