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10. Exposure to Certain Industrial Metals
The common expression “mad as a hatter” actually has a basis in fact, and it has its origins in descriptions of hat-makers, who often used hazardous substances during the manufacturing process during a time where people weren’t fully aware of the associated health risks. Working with the contaminated substances would cause any number of different health issues in those who had to do it, which made them appear “mad” several hundred years ago.
In almost the same way, exposure to certain types of metals and materials involved in their refinement could be associated with an increased risk of developing sarcoidosis. While a lot more research still needs to be conducted to find out what all of the possible risks could be, working in close proximity with beryllium (where fumes might be inhaled) for a long time could up your risk considerably, and might even trigger the condition in the first place.