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While many chemicals in cosmetics present hardly any or zero threat, several dozen are linked to substantial health issues, including developmental delays and cancer. Cosmetic chemicals get into a person's body through the skin and inhalation, and lead to similar risks as food chemicals, per this site.

Chemicals linked to cancer can be found in water, food, and many other everyday goods. Still, no classification of consumer goods is subject to less government inspection than cosmetics and other personal products, including Jet Set. Though many of the chemicals in cosmetics and personal care products almost certainly pose minimal risk, exposure to a few is linked to critical health concerns, such as cancer.