ZMA is a supplement composed of zinc monomethionine aspartate, magnesium aspartate, and vitamin B6.[1] The first study to assess the effect of supplementation with ZMA in humans was conducted by the manufacturer of this supplement and found that ZMA raised testosterone levels and increased muscle strength and power in athletes.[2] However, follow-up studies by independent groups do not support those initial findings.[3][4]
References
- ^Kerksick CM, Wilborn CD, Roberts MD, Smith-Ryan A, Kleiner SM, Jäger R, Collins R, Cooke M, Davis JN, Galvan E, Greenwood M, Lowery LM, Wildman R, Antonio J, Kreider RBISSN exercise & sports nutrition review update: research & recommendationsJ Int Soc Sports Nutr.(2018 Aug 1)
- ^Brilla et alEffects of a Novel Zinc-Magnesium Formulation on Hormones and StrengthJournal of Exercise Physiology.(2020)
- ^Wilborn CD, Kerksick CM, Campbell BI, Taylor LW, Marcello BM, Rasmussen CJ, Greenwood MC, Almada A, Kreider RBEffects of Zinc Magnesium Aspartate (ZMA) Supplementation on Training Adaptations and Markers of Anabolism and CatabolismJ Int Soc Sports Nutr.(2004 Dec 31)
- ^Koehler K, Parr MK, Geyer H, Mester J, Schänzer WSerum testosterone and urinary excretion of steroid hormone metabolites after administration of a high-dose zinc supplementEur J Clin Nutr.(2009 Jan)