Sebum

Sebum is an oily substance that is produced by our sebaceous glands. It is designed to protect our skin and hair from dehydration and environmental aggressors. When our sebaceous glands become clogged, they can no longer produce sebum effectively, resulting in dry, dull skin. The best way to prevent this from happening is to cleanse your skin regularly with a mild cleanser and to exfoliate regularly to remove dead skin cells that can clog your pores.