Nugenix PM is a nighttime free testosterone booster anchored by ZMA, a clinically researched ingredient to support healthy testosterone levels. ZMA is an anabolic support formula containing highly bioavailable, patented zinc mono-L-methionine sulfate (L-OptiZinc), zinc aspartate, magnesium aspartate and vitamin B6. ZMA combined with Tribulus Terrestris and sleep aid Melatonin, help to support testosterone, proper sleep, and muscle strength.