ZMA is Zinc, Magnesium and vitamin b-6. Used as a vitamin supplement in addition to your multi. (twin lab ZMA) You take it before bed on an empty stomach. It may help bring your nads back after d-bol and during var (anavar supposingly does not affect nat test). Also will help get sound sleep. and definetly cant hurt anything.
read this lab test:
L. R. Brilla, Western Washington University, Bellingham, WA 98225, and V. Conte, BALCO Laboratories, Burlingame, CA 94010.
A double-blind, randomized study was conducted to determine the effect of a novel zinc and magnesium formulation (ZMA) on anabolic hormone levels and strength in athletes. Members of the University football team (n=27) had blood collected at the beginning and end of an 8 week period of intensive training. Subjects were supplemented with ZMA (n=12) or placebo (n=15) for the 8 weeks. The ZMA group took 3 capsules nightly that contained a total of 30 mg of ZN as monomethionine/aspartate, 450 mg of Mg as aspartate and 10.5 mg of vitamin B-6. The plasma Zn and Mg levels increased in the ZMA group by 29.1% (.804 to 1.038 mcg/ml) and 6.2% (19.43 to 20.63 mcg/ml), respectively, while levels decreased in the placebo group by 4.4% (.836 to .799 mcg/ml) and 9.2% (19.68 to 18.04 mcg/ml), respectively. The total and free testosterone levels in serum increased in the ZMA group by 32.4% (567.9 to 752.7 ng/dl) and 33.5% (132.1 to 176.3 pg/mL), respectively, in contrast to the placebo group which decreased by 10.5% (588.8 to 526.8 ng/dL) and 10.2% (141.0 to 126.6 pg/mL), respectively. The serum, IGF-1 levels increased in the ZMA group by 3.6% (424.2 to 439.3 ng/mL) and decreased in the placebo group by 21.5% (437.3 to 343.3 g/mL). All comparisons were statistically significant