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ON ZMA is a mixture of Zinc, Magnesium Aspartate, and Vitamin B6. Research shows ZMA to have a positive effect on sleep, endurance, and muscle growth - all of which a budding athlete needs. It's not how much sleep, but the quality of sleep, that separates high-level competitors from their recreational counterparts.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.