NOW&ampreg; TestoJack 100&amptrade; contains a potent standardized extract of Eurycoma longifolia, commonly known as Tonkat Ali or Long Jack.&ampnbsp; LJ100&ampreg; contains bioactive Eurypeptides, the active constituents of Tongkat Ali.&ampnbsp; Clinical and non-clinical studies have shown that Tongkat Ali extracts support male reproductive function and halthy testosterone levels.&ampnbsp; Tribulus has been included for its virility supporting effects as shown in scientific studies.&ampnbsp; TestoJack 100&amptrade; also contains ZMA&ampreg;, a synergistic combination of zinc and magnesium for the support of healthy immune, reproductive and neuromuscular function.&ampnbsp; This combination of ingredients in TestoJack 100&amptrade; provides enhanced energy levels without the anxiety or insomnia that accompanies other energy supplements, as well as overall support for men's health.*