MAKEUP PRODUCTS (NON-PERMANENT)

Although many chemicals in beauty products and cosmetics pose slight or absolutely no threat, some have been linked with substantial health problems, including neurological harm and cancer. Cosmetic chemicals invade a person's body through internal use, the skin, and inhalation, and lead to similar dangers as food chemicals, per this site.

Chemicals linked to cancer can be found in food, water, and several other commonly used products. Still, no group of consumer products is susceptible to less government inspection than cosmetics and other personal products, including Duo Eyeliner. While most of the contaminants and chemicals in cosmetics almost certainly present minimal risk, exposure to some has been linked to major health concerns, including cancer.