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					Originally Posted by  sltr
					 
				 
				i think it's the galvanized metal that is an issue in the cooking method 
			
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 Yep.  If it's not aluminum, then galvanized iron is still bad.  Galvanized iron sheeting is usually coated with Zinc.  Quite toxic at elevated levels. 
http://www.ajcn.org/cgi/content/abstract/51/2/225