ZMA is one of the most researched supplements out there. There's so many garbage supplements without any good studies that are huge sellers, but has no effect. The thing about ZMA is that it is well researced. Studies show that it's indeed a natural testosterone booster [1,2], it increased strength, endurance [1,4] and recovery [4].
That's not the only thing about ZMA. The combination of zinc, magnesium and vitamin b-6 can also increase IGF-1 [3] and decrease cortisol levels [5] - making ZMA a great anti-catabolic supplement.
[1] Brilla, L.R. 2000 - Effects of a Novel Zinc-Magnesium Formulation on Hormones and Strength
[2] Prasad AS et.al. Zinc status and serum testosterone levels of healthy adults. Nutr 1996:12:344-8.
[3] Dorup I et.al. Role of insulin-like growth factor-1 and growth hormone in growth inhibition induced by magnesium and zinc deficiencies. Br J Nutr 1991:66:505-21.
[4] Brilla LR et.al. Magnesium in sports physiology and performance. In: Kies CV, Driskell JA, editors. Sports Nutrition: Minerals and Electrolytes, An American Chemical Society Monograph. Boca Raton, FL: CRC Press, 1995:139-77.
[5] Golf SW. et.al. On the significance of magnesium in extreme physical stress. Cardiovasc Drugs Ther 1998:12:197-202.
Read more about ISS Research ZMA or check out other testo boosters.
torsdag 30. juli 2009
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