Beginner's guide to bodybuilding.

If you are just taking the multi vitamins from animal pak then there is no need to worry heh.

I used optimum nutritions ZMA. I didnt really cut down on calcium. Never really thought about it . There are some studies that show that it is very beneficial. But there were also some studies that showed that the athletes in these studies were already deficient in zinc and magnesium. But this only showed that as an athlete unless you are replenishing these minerals through a source you are going to need to take them. I suggest , if you want to, get ON's ZMA and take it as directed on the bottle.