We often complain about sebum, but we must know that sebum is a fundamental constituent of our skin. It is synthesized and secreted by sebaceous glands and chemically consists of squalene, fatty acids triglycerides, and cholesterol.

But why is it so important?

It contributes to the formation of the hydrolipidic film;
It creates a semipermeable barrier that opposes transepidermal water loss, therefore indirectly providing hydration;
It regulates the skin pH;
It has antibacterial action.

In some people, however, sebum is produced in excess, and the skin appears shiny, greasy, and more prone to impurities, giving rise to the so-called “oily skin.” The main cause of oily skin lies in a personal predisposition that determines an alteration in the production of hormones that regulate sebum production. The condition can worsen during periods of high stress or in certain climatic conditions, such as during hot and humid summer days. The increase in sebum production alters the composition of the hydrolipidic film and impairs the physiological functions of the skin. The excess lipid content makes cutaneous transpiration difficult, clogs skin pores, and promotes the growth of pathogenic microorganisms. As a result, individuals with oily skin often experience inflammation, redness, blackheads, whiteheads, and may develop seborrheic dermatitis, dandruff, or acne, depending on the type of oily skin.

a cura di CHIARA DUILIO
BIOLOGA