MAKEUP PRODUCTS (NON-PERMANENT)

Although the majority of chemicals in beauty products pose limited or no risk, several dozen have been linked with significant medical issues, including developmental delays and cancer. Chemicals in cosmetics invade a person's body through the skin, inhalation, ingestion and internal use, and pose the same problems as food chemicals, per this site.

Contaminants and chemicals associated with cancer can be found in food, water, and many other common products. However, no sector of consumer products is accountable to less government oversight than cosmetics, including cake eyeliner. Though most of the chemicals in cosmetics and personal care products likely present very little risk, being exposed to a few is associated with worrying health problems, including cancer.