understanding melanin production how ultraviolet light impacts skin cell pigmentation at a microscopic level

photoprotection understanding pigmentation ultraviolet microscopic fascinating intricately specialized melanocytes photodamage dermatology production appearance profoundly influenced artificial protection protective prevention physiology radiation emanating sunscreen mechanism synthesis processes exposure critical triggers cellular response function melanin impacts process sources cascade healthy barrier pigment linked health driven factor events cancer damage safety dermal light level cells aging types skin cell tone care