ZMA raises testerone. Makes you sleep better too.
Don't drink milk with it, calcium gets priority to be absorbed by the bod.
EDIT: see next post!
Zinc status and serum testosterone levels of healthy adults.
Prasad AS, Mantzoros CS, Beck FW, Hess JW, Brewer GJ.
Department of Internal Medicine, Wayne State University School of Medicine, Detroit, Michigan, USA.
Zinc deficiency is prevalent throughout the world, including the USA. Severe and moderate deficiency of zinc is associated with hypogonadism in men. However, the effect of marginal zinc deficiency on serum testosterone concentration is not known. We studied the relationship between cellular zinc concentrations and serum testosterone cross-sectionally in 40 normal men, 20 to 80 y of age. In four normal young men (27.5 +/- 0.5 y), we measured serum testosterone before and during marginal zinc deficiency induced by restricting dietary zinc intake. We also measured serum testosterone in nine elderly men (64 +/- 9 y) who were marginally zinc deficient before and after 3 to 6 mo of supplementation with 459 mumol/ d oral zinc administered as zinc gluconate. Serum testosterone concentrations were significantly correlated with cellular zinc concentrations in the cross-sectional study (lymphocyte zinc versus serum testosterone, r = 0.43, p = 0.006; granulocyte zinc versus serum testosterone, r = 0.30, p = 0.03). Dietary zinc restriction in normal young men was associated with a significant decrease in serum testosterone concentrations after 20 weeks of zinc restriction (baseline versus post-zinc restriction mean +/- SD, 39.9 +/- 7.1 versus 10.6 +/- 3.6 nmol/L, respectively; p = 0.005). Zinc supplementation of marginally zinc-deficient normal elderly men for six months resulted in an increase in serum testosterone from 8.3 +/- 6.3 to 16.0 +/- 4.4 nmol/L (p = 0.02). We conclude that zinc may play an important role in modulating serum testosterone levels in normal men.
A Novel Zinc and Magnesium Formulation (ZMA)
Increases Anabolic Hormones and Strength in Athletes
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 (P<0.001). Pre and post isokenetic strength determinations in newton meters were made using a Biodex dynamometer. Subjects (ZMA n=10; placebo n=11) were measured for maximum quadricep strength on the right leg at 180 degrees per sec (strength) and 300 degrees per second (functional power). The ZMA strength group change at 180 degrees per second was 11.6% (189.9 to 211.8) compared to the placebo group change of +44.6% (204.2 to 209.1) and the ZMA group change at 300 degrees per sec. was +18.2% (316.5 to 373.7), in contrast to the +9.4% (369.5 to 404.3) for the placebo group (P<0.05). These findings suggest that nightly supplementation with ZMA significantly increases Zn and Mg levels, anabolic hormone levels as well as strength and power in athletes.
Sports Medicine, Training and Rehabilitation Journal, November 1998 (in press)
