From somewhere:
In any case, aluminum isn't easy to avoid. You can probably dump your aluminum cookware without too much trouble, but you'll find aluminum is also contained in many common antacids and antiperspirants. I note, for example, that my friendly bottle of Ban Basic here contains aluminum chloride and aluminum chlorhydrate. (Granted, you can now get aluminum-free deodorants.) Even more insidious, aluminum is added to many municipal water supplies to help remove floating debris. Aluminum is also found in household baking powder, self-rising flour, cake mix, pancake batter, and frozen dough (as sodium aluminum phosphate, a leavening agent); in nondairy creamers, table salt, and other powdered foods (as an anticaking ingredient); in processed cheese (as an emulsifier); and in hemorrhoid preparations (up to 50 percent aluminum hydroxide). The known human requirement for aluminum, you may be interested to know, is absolutely zero. Have a nice day, kids.
I think the aluminum in cartos is a risk I can live with. Not that I use cartos much anymore.