Haya Labs ZMA 180 Caps Benefits Supports healthy testosterone levels Improves sleep quality May increase muscle strength Can help with better nutrient absorption Predator Nutrition ZMA 180 Caps Review ZMA is a synergistic combination of Zinc, Magnesium & vitamin B6 which have been proven to restore body’s natural levels of testosterone & support hormonal balance as a whole. This increase in anabolic hormone levels can lead to more muscle strength & increased muscle mass. Zinc & Magnesium are also beneficial for improving sleep quality & rest, so supplementing ZMA is critical for better recovery.