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    GlossarySebum (sebum oil)

    oily substance produced by sebaceous glands in skin

    Sebum is an oily substance produced by sebaceous glands in the skin. It helps to lubricate and waterproof the skin and hair, providing a protective barrier against external elements. Sebum is composed of triglycerides, wax esters, squalene, and free fatty acids, and its overproduction can contribute to conditions like acne.

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