5% Nutrition Core ZMAContains 90 Capsules 5% Core ZMA is designed to promote recovery in athletes by restoring depleted Zinc and Magnesium levels while adding Boron to help increase free testosterone. ZMA is made up of zinc, magnesium & vitamin B 6, this combination was designed to promote recovery in athletes. Zinc plays a major role in maintaining healthy testosterone levels as well as regulating immune functions. Magnesium is essential in supporting muscle and nerve