What role do sebaceous glands play in skin health?

Sebaceous glands are specialized glands located within the skin that primarily secrete an oily substance known as sebum. This secretion is crucial for maintaining skin health because it lubricates the skin and hair, preventing them from becoming dry and brittle. Sebum plays a protective role by forming a barrier against environmental factors like bacteria and fungi, helping to maintain the skin's natural moisture balance.

In contrast, the production of sweat is the function of sweat glands, which help regulate body temperature and provide cooling rather than lubrication. Meanwhile, storing energy is not a function of sebaceous glands; this role is typically associated with adipose tissue in the body. Lastly, structural support in the skin is mainly provided by collagen and elastin fibers within the dermal layer, rather than by sebaceous glands. Thus, the primary role of sebaceous glands in skin health is indeed to lubricate the skin, which is fundamental for maintaining its suppleness and protective barrier function.