!What's the Difference Between Epidermis, Dermis, and Subcutaneous Fat? - SUSHENAH scientific illustration Your skin has three distinct layers, each with a specific job—and understanding them changes how you think about skincare. According to research in Andrews' Diseases of the Skin, the skin "is composed of three layers: the epidermis, the dermis, and subcutaneous tissue." ### What Each Layer Does Epidermis (outermost): Your protective barrier. Contains keratinocytes that form the stratum corneum. This is where barrier repair happens. Dermis (middle): Your structural support. Contains collagen (70% of skin's dry weight), elastin fibers, and blood vessels. This is where firmness lives. Subcutaneous fat (deepest): Your cushion and energy store. Contains fat cells (lipocytes) that insulate and provide buoyancy. Here's why this matters. Most skincare only reaches the epidermis. But different concerns originate in different layers. Barrier issues are epidermal. Firmness loss is dermal. Understanding this helps you target the right layer. Learn more about cause-based care and why knowing your skin's architecture matters.
