That's just the magnesium. No need to use ZMA. You get a good amount of magnesium in DX7. If you want more before bed, but some extra from vitamin shoppe for 5 bucks. No need for ZMA. A scam supplement.
Zinc acts as an armotise inhibitator along with raise testosterone levels, save it for comming off your cycle. Tribulus is another good product that raises LH and Test, sadly raises estrogen more than test...still, seems to work well off cycle.