Axe & Sledge Manpower is one of many new-wave test boosters. For a long time in the supplement industry test boosters and weight loss pills were like flux capacitors and almost everyone knew it. Those days are near the end as we introduce products that can actually enhance male hormones over the counter. What a world we live in! Total testosterone is definitely a sought after goal, but if you talk to any endocrinologist they're going to tell you that Free Testosterone is where it's at for building muscle. The Axe & Sledge Manpower test booster is geared toward freeing up just that. Along with the test boosting properties, Manpower also has laxogenin to aid in nitrogen retention which can help with muscle building and retaining.