You can supplement vitamin c if you're unable to ... And although iron absorption increased by 67% when they took 100 mg of vitamin C with a meal, overconsumption of iron-rich foods and vitamin ...
Once your level goes above 30 nanograms per milliliter, you will usually take a 1,000-2,000 IU supplement per day. If you are at high risk for vitamin D deficiency because of taking certain ...