Michigan Esthetician State Board Practice Exam

Salicylic acid is recognized for its effectiveness as an exfoliant due to its ability to penetrate pores and dissolve excess sebum and dead skin cells. This beta hydroxy acid (BHA) is particularly beneficial for oily and acne-prone skin, as it helps unclog pores and reduces the occurrence of breakouts. When incorporated into exfoliating products, salicylic acid not only aids in physical exfoliation but also offers chemical exfoliation, making it a versatile ingredient in skincare.

Retinol, while also an effective exfoliant, primarily works by promoting cell turnover at a different level within the skin and is often classified as a vitamin A derivative. Hyaluronic acid is known for its hydrating properties rather than exfoliation, as it helps retain moisture in the skin. Vitamin C is praised for its antioxidant benefits and can aid in brightening the complexion but is not primarily used for exfoliation in the same manner as salicylic acid. Thus, salicylic acid stands out as the key ingredient specifically for exfoliation in this context.