(ABCNEWS.GO) — Beware of lipstick-stained lips before puckering up this Valentine’s Day. They could be covered in lead.

Reuters first reported that a new study conducted by the FDA found that 400 lipsticks on the market tested positive for lead, according to the Campaign for Safe Cosmetics, a coalition that advocates for safer cosmetics and hygiene products.

Maybelline Color Sensation by L’Oreal USA was the worst-offending lipstick of the group tested, the Campaign said. It contained more than 275 times the amount of lead that was found in the least-contaminated product.

Children’s products in the U.S. cannot contain more than 100 parts per million of lead. The highest offending lipstick contained 7.19 parts per million, the group said.

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