Lead is a neurotoxin and can cause health problems, including learning disabilities, behavioral problems, stunted growth, and mental retardation. Young children and pregnant women are especially vulnerable to lead exposure.
There is no standard limit for lead in lipstick. Now, the FDA will investigate claims about lead content in US made lipsticks.
The Cosmetic, Toiletry and Fragrance Association says, "For decades, cosmetic companies have worked to minimize all product contamination, including lead. They actively and continually review all raw materials to ensure that they contain the lowest levels of impurities possible. The average amount of lead a woman would be exposed to when using cosmetics is one-thousand times less than the amount she would get from eating, breathing, and drinking water that meets e-p-a drinking water standards."
The Campaign for Safe Cosmetics lists these among the top brands testing positive for lead: L'Oreal Colour Riche "True Red" 0.65ppm L'Oreal Colour Riche "Classic Wine" 0.58 ppm Cover Girl Incredifull Lipcolor "Maximum Red" 0.56ppm Dior Addict "Positive Red" 0.21 ppm. Link