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Though the majority of chemicals in cosmetics pose minimal or no threat, some are linked to considerable medical conditions, including developmental delays and cancer. Cosmetic chemicals enter a person's body through inhalation, the skin, and ingestion, and pose similar risks as food chemicals, per this site.

Chemicals and contaminants linked to cancer can be found in food and several other commonly used products. But, no category of consumer products is accountable to less government direction than cosmetics, including Ultra Sensitive FaceBlock SPF25. Though many of the chemicals in cosmetics and personal care products almost certainly pose little risk, exposure to some has been linked to substantial health problems, including cancer.