Product description Vitamin C contributes to normal collagen formation Copper as a contribution to normal skin pigmentation and normal connective tissue formation With collagen hydrolyzate Also included is coenzyme Q10 As we age, our skin tends to thin. This is where Doppelherz collagen capsules can help. Collagen is an important structural protein of the skin and is mainly found in the connective tissue. Hyaluronic acid as an endogenous substance is also found in the skin and can bind large amounts of water. In addition, the coenzyme Q10 is used.