Isn't excess iron only not absorbed if it is non-heme iron? Not an expert or anything, that's just what I remember hearing somewhere.
The episode is among the few that you cannot stream from their own website, but it's, still on YouTube[0]. I am pretty sure legal threats from Kellogs had to do with tgat, because the week after the episode in question aired, people on that program were forced to publically apologise for joking that Kellogs was putting crusher bicycles in their cornflakes. Also, Kellogs actually took out a full-page ad stating that they don't and that the people on that show were slandering.
The corporation doth protest to much, methinks.
[0] https://www.youtube.com/playlist?list=PL2AC0E0D930B52A07
It’s also misinformation that your body won’t absorb iron because of calcium intake, it’s just that calcium inhibits iron absorption somewhat, and only short-term, it doesn’t stop it completely. It’s not that well understood.
> [mineral iron] it will react in your stomach and change to Fe2+
Wouldnd't the presence of an acid-neutralizing ingredient like milk negatively affect this process?
> it’s just that calcium inhibits iron absorption somewhat, and only short-term, it doesn’t stop it completely.
Could you be a bit more precise when you say "short-term"? If it basically reduces absorption for the current meal the point of it defeating iron absorbtion is still valid.
Personal correspondence with a nutrition PhD. Not going to identify for unrelated reasons.
> Wouldnd't the presence of an acid-neutralizing ingredient like milk negatively affect this process?
Milk is acidic in the first place. In either case, it doesn’t raise the pH of your stomach very much.
> Could you be a bit more precise when you say "short-term"?
Short enough that the effect is gone before you finish digesting the meal.
https://www.ncbi.nlm.nih.gov/m/pubmed/21462112/
From what I gather, there were some studies that claimed that calcium interferes with iron absorption, and it’s clear that it does, but it might not have much of an effect on nutrition.