HAIR CARE PRODUCTS (NON-COLORING)

While most chemicals in cosmetics present minimal or zero threat, several are associated to substantial medical problems, such as cancer, reproductive and neurological harm, and developmental delays. Cosmetic chemicals enter a person's body through inhalation, ingestion, and the skin, and cause similar problems as food chemicals, per this site.

Contaminants and chemicals linked to cancer are found in water, food, and various other everyday items. But, no type of consumer items is subject to less government management than cosmetics, including Weekender Shampoo. Though most of the chemicals and contaminants in cosmetics likely present little risk, being exposed to some is linked to worrying health concerns, including cancer.