4. ZMA
ZMA is a combination of zinc, magnesium aspartate, and vitamin B6. It’s great for people who go hard like athletes and boy builders because they tend to lack sufficient levels of these minerals that are important for hormones and sleeping at night, an essential part of recovery. Training too hard can damage your testosterone and IGF-1 levels. It was shown that athletes who took ZMA had a boost in their testosterone and IGF-1 levels, while athletes who didn’t take it saw a drop. Remember that testosterone and IGF-1 are essential for building muscle.
