DHEA don't work so save your money!
ZMA is great especially in these hot months. I take it on an empty stomach about a half hour BEFORE i workout, unlike others who take it before bedtime, because it wakes me up (if you know what i mean!). I ONLY take it on workout days & use a good multivitamin after my workouts.
Do not take it with calcium containing foods because it blocks absorbsion. Also, even though it works great, be careful about taking too much or for extended periods of time cause it can cause mineral/electrolyte imbalances (cramps/spasms).