MAKEUP PRODUCTS (NON-PERMANENT)

While many chemicals in cosmetics pose little or zero danger, several dozen are associated to serious medical conditions, including cancer, and neurological harm. Chemicals in cosmetics invade a person's body through the skin and inhalation, and lead to similar risks as food chemicals, per this site.

Chemicals associated with cancer can be found in water, food, and many other everyday goods. However, no classification of consumer goods is subject to less government oversight than cosmetics, including Brow Definer Pencil. Though many of the chemicals and contaminants in cosmetics and personal care products almost certainly pose little risk, subjection to some has been associated with worrying health issues, such as cancer.