MAKEUP PRODUCTS (NON-PERMANENT)

While many chemicals in cosmetic products pose hardly any or zero threat, some are associated with substantial medical conditions, such as cancer, reproductive and neurological harm, and developmental delays. Cosmetic chemicals invade a person's body through the skin, inhalation, ingestion and internal use, and pose the same risks as food chemicals, per this site.

Chemicals and contaminants linked to cancer are found in food, water, and a lot of other commonly used products. Still, no category of consumer products is susceptible to less government oversight than cosmetics, including self sharpening precision eyeliner. Although most of the contaminants and chemicals in cosmetics and personal care products probably present little risk, exposure to some has been linked to serious health issues, including cancer.