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Though the majority of chemicals in beauty products and cosmetics pose little or no risk, dozens are linked with serious medical issues, including developmental delays and cancer. Cosmetic chemicals get into your body through inhalation, ingestion, and the skin, and lead to the same problems as food chemicals, per this site.

Chemicals associated with cancer can be found in water, food, and many other commonly used goods. But, no classification of consumer goods is accountable to less government inspection than cosmetics and other personal care products, including NARS Pure Sheer SPF Lip Treatment. While many of the contaminants and chemicals in cosmetics most likely present very little risk, exposure to a few has been associated with serious health concerns, such as cancer.