>>12837253Generally no, iron absorption is very low (3% or so) and controlled homeostatically so it will go lower if you have enough already and don't have any genetic diseases. I could be wrong though, if you're taking a lot for a long time there might be some increased risk of diseases like cancer, but it gets hazier than "poisoning" and is in the "association" range,
On the other hand, it can make you constipated (women on prenatals get this), and it can interfere with absorption of other metals if you take a large amount consistently at the same time as other foods.
