Did you know that the epidermis (outermost layer of skin) of dark skin absorbs 70% of UV rays, while the epidermis of light skin only absorbs 25%? Five percent of the UV rays that reach the outer epidermis of dark skin go as far as the papillary dermis (where collagen & elastin are found), whereas 3 times that amount (15%) reaches the dermis in a person with lighter skin, resulting in more pronounced signs of skin aging.
