Which ingredient is antibacterial and anti-inflammatory and commonly used for acne-prone skin?

• A. Benzoyl peroxide
• B. Salicylic acid
• C. Hyaluronic acid
• D. Retinoic acid

Answer: (A)

Antibacterial action combined with anti-inflammatory effect is what makes benzoyl peroxide effective for acne-prone skin. It works by releasing oxygen inside pores, creating an environment that kills the acne-causing bacteria within follicles. This reduction in bacterial load also helps to lessen the inflammatory response, so redness and swelling around pimples decrease. That combination is why it’s a common first-line topical treatment for acne.

Salicylic acid mainly acts as a keratolytic, helping to exfoliate and unclog pores, with mild anti-inflammatory effects but not primarily antibacterial. Hyaluronic acid is hydrating and does not have antibacterial properties. Retinoic acid helps normalize skin cell turnover and reduces inflammation, but its primary action isn’t antibacterial. So benzoyl peroxide best fits the description.