Is rust bad for you
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- iron oxide itself is not harmful
- but it happens most in moist places, which also breeds things that are harmful
For example, a a rusty water cooker is no risk, because it's purely rust, and the frequent boiling will kill most anything.
(A iron / cast iron pan will sometimes be doing chemistry, which can matter.
Rusty nails and surfaces can be bad, but this is because places that collect rust are typically also dirty and moist, which is a good place for bacteria to be in large numbers.
So stepping on a rusty nail in an old dirty moist run-down industrial building is a little riskier than stepping on a rusty nail in your room.
A good bleed will wash things away. That said, e.g. tetanus is easier to prevent than to cure. At least try to catch it early - stiffness of the jaw and neck are early indicators.
- cooking in cast iron
- you won't get much iron out of an iron / cast iron pan unless you cook something acidic in it
- note that treating your iron pan carefully (oiling it before and after) helps.
- iron itself is insoluble in water -- but with acid around, it will react. Which is why (cast) iron pan instructions tend to mention tomatoes and perhaps applesauce
- if you cook spaghetti every day, you may want to use another pan -- but even the amount of iron that releases seems to be within safe levels(verify)
- You need a little iron, for your blood to carry oxygen. A deficit is anemia
- an iron pan can work as an additive(verify) - but you are probably getting enough already, from eggs, beans, some fruit, some grains, some fish.
- your body does excrete excess iron, but only slowly, so avoid structurally getting too much iron
- rather more iron in your diet usually causes nothing worse than fatigue, headaches, possibly anorexia or such.