healthy human skin with collagen and elastin fibers, fibroblasts and hyaluronic acid.

acid age ageing aging anatomy beautiful beauty biochemistry biotechnology body care close collagen cosmetic cross dermatology dermis diagram disease elastin epidermis fiber fibre health healthy human hyaluron hyaluronic hydrolyzed infographic layer medical medicine molecular molecule old older science section skin skincare structure surface treatment tropocollagen wrinkle wrinkled