Esthetician Practice Exam Esthetician Practice Esthetics Chemistry and Ingredients 1

Question 1

Which type of acid is classified as a beta hydroxy acid (BHA) and is oil-soluble, making it effective for penetrating pores?

Accepted Answer

Salicylic acid

Answer

Salicylic acid is a beta hydroxy acid (BHA) that is oil-soluble, allowing it to penetrate sebum-filled pores and exfoliate inside the follicle, making it especially effective for acne-prone and oily skin.

Question 2

What is the role of a humectant in a skincare product?

Accepted Answer

To attract and bind water molecules to the skin

Answer

Humectants such as hyaluronic acid and glycerin work by attracting water molecules from the environment and the deeper layers of the skin, drawing moisture into the stratum corneum.

Question 3

Which of the following best describes the function of a preservative in a cosmetic formulation?

Accepted Answer

To prevent microbial growth and extend shelf life

Answer

Preservatives such as parabens, phenoxyethanol, and benzyl alcohol are added to cosmetic formulations to inhibit the growth of bacteria, mold, and yeast, thereby preventing spoilage and ensuring product safety.

Question 4

Retinol is a form of which vitamin, commonly used in anti-aging skincare products?

Accepted Answer

Vitamin A

Answer

Retinol is a derivative of Vitamin A. It works by accelerating cell turnover and stimulating collagen production, which helps reduce the appearance of fine lines, wrinkles, and hyperpigmentation.

Question 5

What term describes an ingredient that helps other ingredients penetrate more deeply into the skin?

Accepted Answer

Penetration enhancer

Answer

A penetration enhancer is an ingredient that temporarily alters the skin's barrier to allow active ingredients to pass more deeply into the stratum corneum and beyond, increasing their efficacy.

Esthetician Practice Exam Practice Test

Esthetician Practice Exam Practice Test

Esthetician Practice Exam Esthetician Practice Esthetics Chemistry and Ingredients 1