As I understand it you only would really need to take supplements of something you are short of. Anything past that and your body may just expel it?

Personally I would try to eat well rounded rather than trying to add things via a pill. You can buy a lot of dried fruit and nuts for what some of these TV deals cost. Winco grocery store here has numerous trail mix blends that would be good to snack on, and not too much $$$.