Professors from Yale and Long Island universities and a team from Valisure, a Connecticut-based laboratory, tested 111 benzoyl peroxide (BPO) acne products, including Proactiv and Clearasil.

The lab tested 66 benzoyl peroxide acne treatment products, including creams, lotions, gels, washes, liquids and bars, and discovered that popular brands such as Clearasil, Proactiv, Target's Up ...