Benzoyl Peroxide 5% is a topical gel, cream, or wash primarily used to treat mild to moderate acne by killing acne-causing bacteria like Cutibacterium acnes and reducing inflammation through its antibacterial and keratolytic properties. Available over-the-counter or by prescription in brands like Benzac AC or Acnecide, it penetrates pores to unclog them, decrease oiliness, and promote clearer skin, often showing results in 4 weeks with consistent use. It also finds application in rosacea management for inflammatory lesions, though professional guidance ensures safe integration into skincare routines.