Should we avoid aluminium and iron?
Discussion
Abstain from aluminum usage.
Iron is fine, as long as it's not oxidized (rusted) -- so keep your iron cookware well oiled for protection against unwanted chemical reactions!
I actually don't recommend cast iron because elemental iron, as opposed to heme, is extremely toxic to the body.
Same reason I avoid elemental aluminum.
There's no free lunch.
Some women have trouble with stainless because even small amounts of elemental nickel can be problematic.
On balance I think it's the best of the options.
A glass kettle is great if your stove/situation supports it.
aluminium is fine for cooking on.
aluminium salts that get added to hygiene products are toxic
iron oxide (rust) is good for you if you have an iron deficiency.