ZMA is a natural mineral supplement made up of zinc, magnesium aspartate, and vitamin B6. Zinc supports your immune system and muscles. Magnesium plays a role in metabolism and muscle health and helps manage sleep. B6 may boost energy.
ZMA makers claim that increasing these three nutrients in your system can build muscle strength and stamina, speed muscle recovery, and improve the quality of your sleep.
In 2000, researchers gave ZMA supplements to a group of NCAA football players working out twice a day. After 7 weeks, they found a significant increase in the players’ testosterone and growth hormone, both of which are linked to muscle growth.
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