Save this paper for the next time your ‘caring’ doctor wants to fill you up with isolated Iron and/or with Ascorbic Acid, which he/she calls usually ‘Vitamin C’ because you are sooo anaemic.
It could safe not just your life particularly if you are pregnant!!

‘Iron supplements: the quick fix with long-term consequences’

Abstract
Co-supplementation of ferrous salts with vitamin C exacerbates oxidative stress in the gastrointestinal tract leading to ulceration in healthy individuals, exacerbation of chronic gastrointestinal inflammatory diseases and can lead to cancer. Reactive oxygen and nitrogen species (RONS) have been ascribed an important role in oxidative stress. Redox-active metal ions such as Fe(II) and Cu(I) further activate RONS and thus perpetuate their damaging effects. Ascorbic acid can exert a pro-oxidant effect by its interaction with metal ions via a number of established RONS generating systems which are reviewed here. Further studies are required to examine the detrimental effects of nutraceuticals especially in chronic inflammatory conditions which co-present with anaemia.

“...Conclusions

Co-supplementation of ferrous salts with vitamin C exacerbates oxidative stress in the gastrointestinal tract, predisposing individuals to ulceration, inflammatory disorders, and exacerbation of existing chronic disorders .and may cause cancer...”

full paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC340385/