Which of the following ingredients is often used for its anti-acne properties?

Salicylic Acid is a well-known ingredient for its effectiveness in treating acne. It belongs to a class of compounds called beta hydroxy acids (BHAs). One of its primary functions is to penetrate the pores and exfoliate the inner walls, helping to unclog them and reduce the formation of acne. It also has anti-inflammatory properties, making it beneficial for calming the skin and reducing redness associated with acne.

In contrast, while Retinol is effective for various skin issues, including anti-aging and texture improvement, its use is not solely targeted at acne. Glycerin is primarily a humectant that hydrates the skin but does not directly address acne. Collagen is a structural protein important for skin elasticity and firmness but does not have any acne-fighting characteristics. Thus, Salicylic Acid is specifically highlighted for its known benefits in managing and preventing acne breakouts.