What oily substance moisturizes and protects the skin?

Prepare for the VTCT Level 2 Facial and Skincare Test. Revise with flashcards and multiple choice questions, accompanied by insightful explanations. Ace your assessment with confidence!

Multiple Choice

What oily substance moisturizes and protects the skin?

Sebum is the oily substance produced by the sebaceous glands that keeps the skin moisturized and protected. It forms a thin, continuous film on the surface, which helps lock in moisture and reduce transepidermal water loss. This barrier also helps shield the skin from environmental irritants and has mild antimicrobial properties due to its fatty acids and wax esters, contributing to a healthier skin surface. Water hydrates the skin but it isn’t oily, and it can evaporate quickly, so it doesn’t provide lasting lubrication. Sweat is mainly water with minerals and waste products; it isn’t an oily moisturizer and can even feel drying if left on the skin. Keratin is a structural protein in the outer skin layer, essential for strength and barrier function, but it is not an oily substance and doesn’t moisturize.

Sebum is the oily substance produced by the sebaceous glands that keeps the skin moisturized and protected. It forms a thin, continuous film on the surface, which helps lock in moisture and reduce transepidermal water loss. This barrier also helps shield the skin from environmental irritants and has mild antimicrobial properties due to its fatty acids and wax esters, contributing to a healthier skin surface.

Water hydrates the skin but it isn’t oily, and it can evaporate quickly, so it doesn’t provide lasting lubrication. Sweat is mainly water with minerals and waste products; it isn’t an oily moisturizer and can even feel drying if left on the skin. Keratin is a structural protein in the outer skin layer, essential for strength and barrier function, but it is not an oily substance and doesn’t moisturize.

More practice questions