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While many chemicals in cosmetics present slight or zero risk, several dozen have been linked to substantial medical problems, including developmental delays and cancer. Chemicals in cosmetics gain entry to a person's body through inhalation, the skin, and ingestion, and pose the same risks as food chemicals, per this site.

Chemicals and contaminants linked to cancer can be found in water, food, and lots of other commonly used items. Still, no sector of consumer items is susceptible to less government direction than cosmetics and other personal products, including Phosporous. While most of the contaminants and chemicals in cosmetics likely present very little risk, being exposed to some has been linked to critical health conditions, including cancer.