Zinc is important for almost all-metabolic processes- especially to protein synthesis and maintenance of a healthy immune system. Magnesium helps regulate electrolyte balance, energy production and neuromuscular function.
ZMA is shown to increase growth compounds production and many users (including me) note sensations of deeper sleep when supplementing with it. It's a great aid for recovery
It is most often used as a recovery aid; notably, studies show that ZMA helps the body achieve deeper levels of REM sleep.
ZMA claims to raise strength levels and may enhance hormonal profiles.
Also, the product should not be taken with foods or supplements containing calcium because calcium blocks the absorption of zinc