MAKEUP PRODUCTS (NON-PERMANENT)

Though many chemicals in cosmetic products pose slight or no threat, dozens have been linked to substantial health issues, such as neurological harm and cancer. Chemicals in cosmetics enter a person's body through the skin, inhalation, ingestion and internal use, and lead to similar risks as food chemicals, per this site.

Chemicals and contaminants associated with cancer are found in food and many other everyday products. Yet, no category of consumer products is subject to less government inspection than cosmetics and other personal care products, including self sharpening precision eyeliner. While most of the chemicals in cosmetics and personal care products most likely pose very little risk, subjection to some has been associated with major health concerns, including cancer.