Bioglan Collagen + Acerola & Guava 90s Collagen is the most abundant protein in the human body, it helps to keep our skin firm and youthful looking. From our mid to late 20s, our bodies' ability to produce collagen starts to decline naturally and the youthful structure of our skin begins to break down. Studies have shown that Verisol collagen used in Bioglan Collagen helps nourish and assist the appearance of skin. Natural Vitamin C (from Acerola) and Zinc (from Guava) help support healthy structure and function of skin, nails and hair. Why should I use Collagen + Acerola & Guava? High strength to nourish your skin to good health. Take 3 tablets daily.