IForce Nutrition ZMA 90 Caps I Force Nutrition ZMA features the patented ZMA formula from SNAC System, Inc., HPLC tested for the highest potency & purity. ZMA contains scientifically-proven ratios of zinc, magnesium & vitamin B6 & has been clinically shown to support healthy hormone production, promote lean mass, maximise restful sleep & does not contain any hormones or banned substances. This powerful combination of minerals is delivered in scientifically proven dosages that has been shown to increase testosterone levels & muscle strength in trained athletes, whilst at the same time promoting sleep. Zinc & magnesium are vital minerals for proper hormonal & immune support however, these minerals are rapidly depleted in hard-training athletes. Vitamin B6 is also a critical nutrient for increasing muscle protein synthesis. Supplementing your diet with ZMA means that you can replenish these minerals whilst also supplying Vitamin B6 to promote muscle building while you sleep.