The Facts and Myths About Vitamins Are you someone who takes vitamins or multivitamins? There are a lot of myths about vitamins. For example, supplements always work well together. Reality: Some supplements do help each other out. Vitamin C helps the body absorb iron, for example. Others actually work against each other. Calcium blocks the absorption of iron. So it might be a good idea to take your calcium supplements at a different time from your multivitamin. Some nutrition experts say to eat healthy and clean just get your nutrients in your food. Others say that we should take vitamins in case we fall short and there are those in the camp that says taking too much of the wrong kind could actually be detrimental. The jury is out on many supplements, but most experts believe products are only helpful if you’re deficient in a given nutrient. Women who lose a lot of iron due to heavy menstrual bleeding, for example, might need an additional iron supplement while those who are going through menopause may need extra calcium and vitamin D.