HAIR CARE PRODUCTS (NON-COLORING)

Although the majority of chemicals in cosmetic products pose little or zero threat, several dozen are associated with serious medical issues, such as cancer, and neurological harm. Cosmetic chemicals can enter a person's body through inhalation, ingestion, and the skin, and lead to the same problems as food chemicals, per this site.

Chemicals linked to cancer are found in food, water, and a lot of other everyday items. However, no classification of consumer items is accountable to less government oversight than cosmetics, including Coal Tar Shampoo. While most of the chemicals and contaminants in cosmetics almost certainly present very little risk, exposure to a few is linked to worrying health issues, including cancer.