CAC CAC Product Knowledge & Cosmeceuticals 2

Question 1

Which sunscreen ingredient is a broad-spectrum UV filter that functions through a physical mechanism by reflecting and scattering UV radiation?

Accepted Answer

Zinc oxide

Answer

Zinc oxide is an inorganic (physical/mineral) UV filter that reflects and scatters both UVA and UVB radiation without a chemical reaction.

Question 2

Salicylic acid (BHA) is preferred over AHAs for treating acne-prone and oily skin primarily because it is:

Accepted Answer

Lipid-soluble and can penetrate into sebaceous follicles

Answer

BHA's oil solubility allows it to penetrate pore linings and dissolve sebum and debris within follicles, making it ideal for comedonal and acne-prone skin.

Question 3

The primary role of ceramides in topical skincare formulations is to:

Accepted Answer

Restore and reinforce the skin barrier by replenishing intercellular lipids

Answer

Ceramides make up approximately 50% of the skin's intercellular lipid matrix and topical application helps repair a compromised barrier.

Question 4

Vitamin C (L-ascorbic acid) is most effective and stable in topical products at a pH of:

Accepted Answer

Below 3.5

Answer

L-ascorbic acid requires an acidic environment below pH 3.5 for optimal skin penetration and antioxidant efficacy.

Question 5

A client with a compromised skin barrier would most benefit from which combination of ingredients?

Accepted Answer

Ceramides, cholesterol, and fatty acids

Answer

The skin's natural barrier lipids consist of ceramides, cholesterol, and free fatty acids in a roughly 3:1:1 ratio — replicating this restores barrier function.

(CAC) Certified Aesthetic Consultant Practice Test

(CAC) Certified Aesthetic Consultant Practice Test

CAC CAC Product Knowledge & Cosmeceuticals 2