U.S. health officials are asking retailers to pull a small number of acne creams from their store shelves after government testing found they contain slightly elevated levels of a chemical associated with cancer.

Elevated levels of benzene were detected in seven acne products distributed to national retailers. Here's what the recall means.

Acne treatments sold by Proactiv and Walgreens Boots Alliance are being recalled because they are contaminated with a cancer-causing chemical called benzene, the US Food and Drug Administration said Tuesday.