McCance & Widdowson are legends in nutritional research, especially during the 1940’s during WWII. It is very likely that this duo were responsible for recommending “Iron Fortification” in 1941, although I’ve yet to find that citation (it’s just a matter of time).
In any event, it’s striking that in their 1937 study on iron absorption and excretion, they declare, cautiously, that the bowel excretes virtually no iron!
This then led to the realization that iron metabolism is regulated via intake, not excretion!
Odd, that these distinguished scientists would then recommend adding “Inorganic Iron”, the most toxic and most absorbed form of this heavy metal.
Commentary on McCance & Widdowson 1937 “Absorption & Excretion of Iron” LANCET ii 680-684
A vôtre santé,
Morley M. Robbins