What the function of the oil glands in the skin?

The oil glands, or sebaceous glands, in the skin produce sebum, an oily substance that helps to lubricate and protect the skin and hair. Sebum forms a natural barrier, preventing moisture loss and maintaining skin hydration while also providing antimicrobial properties that help defend against infections. Additionally, it contributes to the skin's overall texture and appearance, promoting a healthy, supple look.