Sebum on the skin is an oily substance produced by the sebaceous glands. Here’s more information about sebum on the skin:

Function of Sebum: The main function of sebum is to maintain the moisture of the skin and hair. Sebum works as a natural moisturizer and protects the skin from drying out. It also creates a protective layer on the skin surface and protects the skin against external factors.
Sebaceous Glands: Sebum is produced by small glands called sebaceous glands. Sebaceous glands are usually located next to hair follicles. These glands are especially concentrated in the face, scalp, chest, back and upper back area.
Composition of Sebum: Sebum has a complex composition. Major components include fatty acids, squalene, cholesterols, ceramides and triglycerides. The combination of these ingredients allows sebum to retain moisture in the skin and form a protective barrier.
Sebum Production: Sebum production is controlled by hormones. Androgen hormones, especially testosterone, can increase sebum production. Therefore, changes in hormones during puberty can cause an increase in sebum production. However, other factors such as genetic factors, stress, nutrition and environmental factors can also affect sebum production.
Sebum and Acne: Although sebum is a substance naturally found in the skin, excessive sebum production can cause skin problems. Excessive sebum production, in particular, can lead to clogging of pores and acne formation. This is due to bacterial growth and increased inflammation in clogged pores.
Sebum Control: Controlling sebum production is important for healthy skin. Sebum production can be controlled with a good skin care routine, regular cleansing, proper moisturizing and the use of the right products. Additionally, a balanced diet, stress management and hormonal balance can also affect sebum levels.

In conclusion, sebum is one of the skin’s natural oils and has an important role for healthy skin. However, unbalanced sebum production can lead to some skin problems. Regular skin care, cleansing and use of appropriate products can help keep sebum production under control. If skin problems persist or become severe, it is important to consult a specialist.