Sebaceous glands produce sebum, an oily substance that lubricates the skin and hair. When these glands are underactive, insufficient sebum is produced. This can lead to dryness and potential irritation of the skin and scalp, as the natural protective barrier is compromised. Hair may appear dull and brittle due to lack of lubrication. For example, reduced sebum production is a common contributor to dry skin conditions, especially in arid climates or during winter months.
Maintaining adequate sebum production is essential for skin and hair health. Sebum protects against environmental damage, retains moisture, and contributes to a healthy skin microbiome. Historically, the importance of sebum was recognized, even if the underlying mechanisms weren’t fully understood. Various natural oils and emollients have been used for centuries to address dryness and maintain skin suppleness, effectively mimicking the role of sebum.
