Have you ever stepped out of a long shower or a swim in the ocean and noticed that your skin does not stay soggy for hours? The reason lies in a quiet, continuous process happening beneath your skin’s surface. Worth adding: your body produces an oily secretion that helps to waterproof body surface, forming an invisible shield that locks moisture in and keeps excess water out. This natural substance, known as sebum, is one of the skin’s most underrated defenses, working around the clock to protect you from environmental stress, microbial invasion, and dehydration.
What Is Sebum and Where Does It Come From?
Sebum is a complex, oil-like substance secreted by microscopic glands embedded in the skin. These glands, called sebaceous glands, are attached to hair follicles across most of the body. They are especially abundant on the face, scalp, chest, and upper back, though they are notably absent from the palms of
