HAIR COLORING PRODUCTS

While many chemicals in beauty products and cosmetics present slight or absolutely no risk, dozens have been linked to serious health issues, including cancer, reproductive and neurological harm, and developmental delays. Chemicals in cosmetics invade the body through the skin, inhalation, ingestion and internal use, and pose similar risks as food chemicals, per this site.

Contaminants and chemicals associated with cancer can be found in water, food, and several other everyday products. However, no classification of consumer products is subject to less government management than cosmetics, including L'Oreal Brush-On Highlights. Although most of the chemicals in cosmetics most likely present very little risk, being exposed to some has been associated with critical health concerns, including cancer.