Another key with cast iron is NEVER NEVER use soap. That ruins the seasoning. Water is just fine. Also, this way your pan develops flavor (hence the term seasoning) so all your eggs will start to taste better (especially if you cook a lot of bacon). You also have to dry them really well to avoid rust issues. If it does rust, just wash it off and season it again.
Here is something else I found as long as we're talking about aluminum:
"Here are my suggestions for minimizing your exposure to aluminum.
* Drinking water should be low in aluminum. Some bottled-water companies provide an analysis of the aluminum content of their water. You might also find out from your public water company what the aluminum level is in the local drinking water.
* Aluminum-containing antiperspirants can easily be avoided, as can aluminum utensils and even, to play it safe, aluminum-containing antacids.
* Commercially processed foods such as cake and pancake mixes, frozen doughs and self-rising flour are sources of dietary aluminum, so their ingestion should be minimized. Watch for and avoid sodium aluminum phosphate, an ingredient in baking powder. Pickles and cheese should also be avoided.
* There is a close relationship between silicon and aluminum in Alzheimer brain lesions, as the two substances bind together to form aluminosilicates.9 High levels of silica in drinking water in the form of silicic acid do seem to protect against the adverse effects of aluminum ingestion, and silicic acid ingestion increases urinary aluminum excretion.10,11 Whether silica supplements protect against the development of dementia has yet to be determined.
* Besides minimizing aluminum exposure, taking the Recommended Dietary Allowance (RDA) of calcium, magnesium and zinc should help to protect against aluminum accumulation.12-14 Deficiencies of these important minerals are common among the elderly.15 Yet, unless there is laboratory evidence of a zinc deficiency, I would not recommend zinc supplementation to help prevent Alzheimer's disease, for two reasons. First, beta-amyloid protein, the major substance found in the brain lesions (usually in a liquid form), binds with zinc. At concentrations only slightly higher than those normally found in the brain, excess zinc may convert the protein to the solid form that is found in Alzheimer lesions.16 This suggests that, at least in theory, excess zinc could actually promote the development of the disease. Second, there is a lack of adequate research demonstrating the efficacy of zinc supplementation in preventing Alzheimer's, although in one study all six relatively young dementia victims had some memory improvement following supplementation with zinc aspartate.17"
or
"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"
seeker of truth
follow no path
all paths lead where
truth is here
E.E. Cummings
It's true.....we have to get rid of the Teflon. Tom bought some cast iron skillets, and I contributed a nice stainless steel fry pan to the mix. Nothing can beat "non-stick" but, it's better to have food that sticks a little than one cooked in Teflon. Although if seasoned correctly, a cast iron skillet can work very well and be stick-free. I just wished I'd gone this route sooner. 
Makes me wonder how much Teflon poison I've injested over the years.
