“Microbial pathogens must compete with the iron-withholding defense systems of their host to acquire this essential nutrient. Here, two high-affinity iron permease genes, CaFTR1 andCaFTR2, were isolated. CaFTR1 expression was induced under iron-limited conditions and repressed when iron supply was sufficient, whereas the expression of CaFTR2 was regulated in a reversed manner. Mutants lacking CaFTR1 but not CaFTR2 exhibited a severe growth defect in iron-deficient medium and were unable to establish systemic infection in mice. Thus, CaFTR1-mediated iron-uptake mechanism constitutes a virulence factor of Candida albicans and may be a target for the development of anti-Candida therapies.”
Quoted from “Science/AAAS” June 2012, VOL. 336.
This means that the fungal Candida will steal iron from the red blood cells in order to use it as a necessary nutrient. So it doesn’t exactly act as “food” for Candida, but more like Raster explained with various minerals which are necessary nutrients for humans.
The article also explains that a host with certain iron deficiencies causes the Candida to exhibit a severe growth defect and therefore were unable to establish systemic a Candida albicans infection. Adding iron corrected the deficiency in the fungus and allowed the Candida to grow.
For these reasons, I have to agree with Javizy; personally, I would try very low profile foods containing iron such as a lot of eggs, and I would use an iron supplement only if the deficiency is heading towards a severe level. I would definitely avoid liver as an iron supplement since it’s only going to hinder the treatment by overwhelming the body with ammonia therefore making an even more beneficial environment for the Candida to thrive.