NutraKey Z Optima, 120 Capsules

The Minerals you’ve Been Missing: Sleep deeper, recover faster, and increase muscle mass.

While NutraKey’s Z Optima is just a simple mineral formula, according to a clinical study with NCAA athletes, supplementing with zinc, magnesium, and Vitamin B6 has shown to be an effective way to increase lean muscle mass, speed up recovery, and boost testosterone. From professional athletes to amateur bodybuilders, the Z Optima formula is one of the least-contested and most effective supplements on the market.