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While the majority of chemicals in cosmetics present little or zero danger, several have been linked with significant health issues, including developmental delays and cancer. Cosmetic chemicals can enter a person's body through internal use, the skin, and inhalation, and lead to similar dangers as food chemicals, per this site.

Chemicals associated with cancer are found in food, water, and several other commonly used goods. However, no group of consumer goods is susceptible to less government oversight than cosmetics, including Happy Anniversary. While most of the chemicals and contaminants in cosmetics probably present very little risk, subjection to some is associated with worrying health issues, including cancer.