HAIR CARE PRODUCTS (NON-COLORING)

While many chemicals in cosmetic products pose limited or zero risk, dozens have been linked with serious medical problems, such as cancer, reproductive and neurological harm, and developmental delays. Cosmetic chemicals can enter your body through the skin, inhalation, ingestion and internal use, and cause similar risks as food chemicals, per this site.

Contaminants and chemicals associated with cancer are found in food, water, and many other commonly used items. Still, no classification of consumer items is subject to less government oversight than cosmetics, including Coal Tar Shampoo. Although most of the chemicals in cosmetics almost certainly pose little risk, subjection to some has been associated with worrying health disorders, including cancer.