i've never made a steak, i've never made a hamburger, i've never made chicken, i've never made turkey and i've never cooked any sort of pig.
....except bacon.
the only meat i've ever bought at the store has been processed lunch meat, for use in things like pasta, and there's almost no iron in the salami i bought (which i actually just learned right now).
so, this didn't change! it's not the cause.