What is the main function of sebaceous glands?

The primary role of sebaceous glands is to produce oil, specifically sebum, which is a natural oil that helps to maintain skin hydration and protect against dryness. Sebum acts as a barrier, preventing moisture loss and providing an additional layer of protection against external elements such as bacteria and environmental pollutants. This oily secretion also plays a critical role in maintaining the elasticity and suppleness of the skin, thereby contributing to overall skin health.

Other options such as producing sweat relate to different types of glands in the body (sweat glands), while absorbing nutrients and filtering toxins are not functions associated with sebaceous glands at all. Therefore, the focus on the production of oil underscores the essential function of sebum in skincare and skin health.