Sebum: The Natural Moisturizer for Healthy Skin

Sebum is an oily secretion from sebaceous glands (attached to hair follicles) composed of triglycerides, wax esters, squalene, cholesterol, and fatty acids. Functions:

• Lubricates skin and hair (prevents desiccation).
• Forms acid mantle (pH ~4.5–5.5) inhibiting pathogens.
• Delivers antioxidants (vitamin E) to skin surface.
• Provides photoprotection (squalene).

Overproduction → acne, seborrhea. Underproduction → dryness, irritation. Hormones (androgens) drive secretion; peaks in adolescence.