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Although the majority of chemicals in cosmetics present hardly any or no danger, dozens have been linked to significant health conditions, including developmental delays and cancer. Cosmetic chemicals can enter a person's body through the skin, inhalation, ingestion and internal use, and pose the same problems as food chemicals, per this site.

Chemicals and contaminants linked to cancer are found in water, food, and several other common items. Still, no category of consumer items is accountable to less government oversight than cosmetics and other personal products, including I'm not Really a Waitress. Although many of the chemicals in cosmetics most likely pose minimal risk, being exposed to a few is linked to major health concerns, such as cancer.