I was even both iron deficient and vitamin D deficient while taking a multivitamin with 100% RDA of both iron (18mg amino acid chelate) and vitamin D (although as D2). I continue to take the multivitamin, on top of separate iron and vitamin D3 supplements, and last I checked (a few years ago), I had normal blood levels. The testing was prompted by blacking out when I’d get up too fast. For the past few years, I’ve been taking just over the upper limit in iron from supplements alone (46 mg/​day, the UL is 45). Your previous post prompted me to check if this was safe, but I think it’s fine since the iron doesn’t absorb as well as heme iron, but maybe I should get tested again and see if I can cut back a bit.
I had been giving blood regularly, too, before I started to black out, but even when I stopped, my ferritin levels didn’t really recover to normal and I kept blacking out, so I added the iron supplement.
I was even both iron deficient and vitamin D deficient while taking a multivitamin with 100% RDA of both iron (18mg amino acid chelate) and vitamin D (although as D2). I continue to take the multivitamin, on top of separate iron and vitamin D3 supplements, and last I checked (a few years ago), I had normal blood levels. The testing was prompted by blacking out when I’d get up too fast. For the past few years, I’ve been taking just over the upper limit in iron from supplements alone (46 mg/​day, the UL is 45). Your previous post prompted me to check if this was safe, but I think it’s fine since the iron doesn’t absorb as well as heme iron, but maybe I should get tested again and see if I can cut back a bit.
I had been giving blood regularly, too, before I started to black out, but even when I stopped, my ferritin levels didn’t really recover to normal and I kept blacking out, so I added the iron supplement.