North Carolina Cosmetic Arts Practice Exam

Identify an ingredient frequently found in acne treatments.

1. Salicylic acid

2. Glycolic acid

3. Benzoyl peroxide

4. Vitamin C

The correct answer is: Benzoyl peroxide

Benzoyl peroxide is a widely used ingredient in acne treatments due to its effectiveness in combating acne-causing bacteria and reducing inflammation. It works by penetrating the pores, where it releases oxygen that helps to kill the bacteria associated with acne, particularly P. acnes. Additionally, it aids in unclogging pores by promoting the shedding of dead skin cells, which can reduce the likelihood of new acne lesions forming. While salicylic acid is also an effective acne treatment, particularly for its ability to exfoliate the skin and penetrate into pores, benzoyl peroxide is often more recognized for its antibacterial properties. Glycolic acid serves mainly as an exfoliant, which can help with overall skin texture and reduce the appearance of acne scars, but it does not directly target acne-causing bacteria. Vitamin C is well-known for its antioxidant properties and role in skin brightening and collagen production, but it is not primarily used as a treatment for active acne. The prominence of benzoyl peroxide in many over-the-counter acne products highlights its critical role in managing and treating acne effectively.