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I don't discount the idea that magnesium and zinc are vital minerals both for health and performance.But short of a deficiency, I've never seen any clinical trials displaying ZMA being effective at significantly altering hormonal profiles.
Plus, it would be more efficient to take a quality multi (which should contain more than 100% Zinc) and a magnesium supplement. Much much more inexpensive as well.
Either way, based on the last post, I think we've been trolled.
That's where your understanding is limited. It's very very easy to be deficient in Zinc & Magnesium if you're an athlete/live an active lifestyle and have a proper diet.
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