Esthetician Practice Exam Esthetician Practice Esthetics Chemistry and Ingredients Questions and Answers 2

Question 1

Which ingredient is commonly used in chemical exfoliants to dissolve the bonds between dead skin cells?

Accepted Answer

Glycolic acid

Answer

Glycolic acid is an alpha hydroxy acid (AHA) that works by dissolving the intercellular cement between corneocytes, promoting exfoliation.

Question 2

What is the primary function of an emulsifier in a skincare formulation?

Accepted Answer

To blend oil and water phases together

Answer

Emulsifiers reduce surface tension between oil and water, allowing them to form a stable, uniform mixture.

Question 3

Which vitamin is also known as ascorbic acid and is used in skincare for its antioxidant and brightening properties?

Accepted Answer

Vitamin C

Answer

Vitamin C (ascorbic acid) is a potent antioxidant that inhibits melanin production and promotes collagen synthesis.

Question 4

What pH range is considered optimal for the acid mantle of healthy skin?

Accepted Answer

4.5 to 5.5

Answer

The acid mantle maintains a slightly acidic pH of 4.5 to 5.5, which helps protect against harmful bacteria and environmental stressors.

Question 5

Which ingredient is a humectant that attracts moisture from the environment to the skin?

Accepted Answer

Hyaluronic acid

Answer

Hyaluronic acid is a powerful humectant capable of holding up to 1,000 times its weight in water, drawing moisture into the skin.

Esthetician Practice Exam Practice Test