ZMA at bedtime? It's just a formula of Zinc, Magnesium and B6 in a certain ratio. Is supposed to have affect on testosterone production in men over 35 or so, and that isn't a hokum claim. It's actually true. Not necessary for younger guys because they produce enough test as it is and it won't do anything for them save give them some whacked-out dreams the first week or so (ZMA makes you have the strangest dreams!) Look it up. Check it out. Let me know your thoughts.