The question is what vitamins does your body need? Not everyone will need the same vitamins which is why I'm not a huge fan of multivitamins, they tend to clump us all together in one category, which just isn't true. Every individual has their own individual needs. For example I know for a fact that I need to avoid iron for the most part because if my body isn't in need of it at this time it will make me sick to my stomach. I also now know that I was in need of vitamin B-12 and vitamin D, which I was told by my doctor after having blood work done. Truth be told blood work is one of the best ways to know what your body currently needs in the way of vitamins.