Mica

According to safecosmetics.org,
“Mica minerals are often used as color additives in cosmetics. They also have reflective properties, allowing for a shimmery effect in mineral foundations. Long term inhalation of mica poses a health risk to workers, specifically those working in muscovite (the most common form of mica) mills and other occupations such as agriculture and construction work.”

Source: http://www.safecosmetics.org/get-the-facts/chemicals-of-concern/mica/


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