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While many chemicals in beauty products pose little or no risk, dozens have been linked with severe medical conditions, including developmental delays and cancer. Cosmetic chemicals get into a person's body through the skin, inhalation, ingestion and internal use, and lead to similar problems as food chemicals, per this site.

Chemicals and contaminants associated with cancer can be found in food, water, and lots of other everyday items. However, no classification of consumer items is subject to less government inspection than cosmetics, including Calendar Girl. Though most of the chemicals and contaminants in cosmetics and personal care products probably present minimal risk, your exposure to a few has been associated with serious health problems, including cancer.