Sebum and the Sebaceous Glands
Sebum and the Sebaceous Glands — the skin's oil-producing system, in which sebaceous glands attached to hair follicles secrete a waxy, lipid-rich substance called sebum. Sebum helps lubricate and waterproof the skin, contributes to the acid mantle, and carries antioxidants to the surface.
Key points
- Sebaceous glands are most concentrated on the face, scalp, chest, and back.
- Sebum is a blend of lipids including triglycerides, wax esters, squalene, and fatty acids.
- It helps condition the skin surface, limit water loss, and support the acid mantle.
- Sebum production is influenced by hormones, genetics, and environmental factors.
- Excess sebum can contribute to oily skin and play a role in the development of acne.
Frequently asked
Why does my skin produce so much oil?
Sebum output is influenced by hormones, genetics, and environment; some people naturally have more active sebaceous glands, particularly in the T-zone.
Is sebum bad for the skin?
No; sebum is a normal and beneficial part of skin function, though excess amounts can contribute to oiliness and clogged pores in some people.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
