ZMA Cycle length

[shomeesharma]

Started Optimum Nutrition's ZMA for a week now. Its supposed to be a natural testosterone booster. I donno how effectively it does that, but one thing's for sure, it does give me a baby's sleep in the night.
Anyone else been using this stuff? Wanted to know, is there a cycle length for zma, or can it be used for long periods of time....????

[hrpiii]

it's just zinc and magnesium... just like any other vitamin. At your age, it's not giving you a boost in any test.