Red Seal Cosmetology Practice Exam

Sebum is a waxy, oily substance that is naturally produced by the sebaceous glands in our skin. These glands are present all over our body, including our face, head, and chest. This substance helps to lubricate and protect our skin and hair. It is made up of various fatty acids, wax esters, and triglycerides. Option B is incorrect because skin cells do not secrete sebum. Option C is incorrect because hair protein does not have the same chemical composition as sebum. Option D is a facial cleanser that can be used to remove excess sebum from the skin, but it is not the same as sebum itself.