+**Sebum** is an oily, waxy substance produced by the [Sebaceous Gland](/wiki/sebaceous_gland)s in mammals. It naturally lubricates and waterproofs the [Skin](/wiki/skin) and hair, forming a protective barrier.
+## See also
+- [Acne](/wiki/acne)
+- [Lipid](/wiki/lipid)
+- [Exocrine Gland](/wiki/exocrine_gland)
... 1 more lines