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While many chemicals in beauty products and cosmetics present very little or absolutely no danger, dozens are linked to serious health problems, including cancer, reproductive and neurological harm, and developmental delays. Chemicals in cosmetics enter a person's body through inhalation, ingestion, and the skin, and pose similar risks as food chemicals, per this site.

Chemicals associated with cancer are found in water, food, and various other common goods. Still, no type of consumer goods is subject to less government direction than cosmetics, including NARS Pure Sheer SPF Lip Treatment. Although most of the chemicals in cosmetics and personal care products almost certainly present minimal risk, being exposed to some is associated with serious health conditions, such as cancer.