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While most chemicals in cosmetics present limited or zero threat, dozens are linked to significant health problems, such as developmental delays and cancer. Chemicals in cosmetics enter a person's body through inhalation, ingestion, and the skin, and pose similar problems as food chemicals, per this site.

Contaminants and chemicals associated with cancer are found in water, food, and lots of other everyday items. Still, no sector of consumer items is susceptible to less government direction than cosmetics, including Stairway to Heaven. Though most of the chemicals in cosmetics and personal care products in all likelihood present minimal risk, exposure to a few is associated with significant health problems, including cancer.