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While most chemicals in cosmetic products present very little or no danger, dozens have been associated with significant health problems, including cancer, reproductive and neurological harm, and developmental delays. Chemicals in cosmetics enter a person's body through inhalation, the skin, and ingestion, and cause the same dangers as food chemicals, per this site.

Chemicals and contaminants associated with cancer are found in water, food, and many other everyday products. Still, no kind of consumer products is susceptible to less government oversight than cosmetics, including Gemstones - Amethyst. Although many of the chemicals in cosmetics and personal care products likely present very little risk, subjection to a few is associated with major health disorders, including cancer.