Skincare Skincare MCQ 4

Question 1

Which type of sunscreen physically blocks UV rays by sitting on top of the skin?

Accepted Answer

Mineral sunscreen

Answer

Mineral sunscreens contain zinc oxide or titanium dioxide and physically reflect and scatter UV rays from the skin's surface.

Question 2

What is the recommended minimum SPF for daily facial sunscreen according to most dermatologists?

Accepted Answer

SPF 30

Answer

Dermatologists generally recommend a minimum SPF 30 for daily use, which blocks about 97% of UVB rays.

Question 3

Which skin concern refers to dark spots left behind after acne or inflammation heals?

Accepted Answer

Hyperpigmentation (PIH)

Answer

Post-inflammatory hyperpigmentation (PIH) occurs when excess melanin is produced in response to inflammation, leaving dark spots after acne heals.

Question 4

Which active ingredient is known for inhibiting tyrosinase and is commonly used to treat hyperpigmentation?

Accepted Answer

Kojic acid

Answer

Kojic acid inhibits the enzyme tyrosinase, which is essential for melanin production, making it effective for treating dark spots.

Question 5

What does 'occlusive' mean when referring to moisturizer ingredients?

Accepted Answer

They form a barrier to prevent moisture loss

Answer

Occlusive ingredients like petrolatum and beeswax create a physical barrier on skin's surface that prevents water from evaporating.

Skincare Practice Test