NOW Foods TestoJack 200 is the advanced, higher-potency version of the TestoJack formula, delivering 200 mg of standardized Tongkat Ali (Eurycoma longifolia) root extract — double the concentration of TestoJack 100 — for men who want more robust testosterone and vitality support. Tongkat Ali is backed by multiple human clinical trials demonstrating improvements in free testosterone levels, muscle strength, body composition, libido, and mood in men experiencing andropause or suboptimal testosterone levels. The formula also includes Maca, zinc, and supporting botanical co-factors. At 200 mg of standardized Tongkat Ali per serving, TestoJack 200 delivers a meaningful clinical dose comparable to those used in published research. GMP-certified and manufactured in NOW's own facility with raw material verification and potency testing.