The original, prohormone-free Animal Stak was launched over nine years ago, and though the formula was cutting-edge at the time, non-hormonal, anabolic supplements utilizing natural hormone boosters were still in their infancy. Almost ten years later, many new compounds have come onto the scene, pushing the envelope and raising the bar as we’ve always strived to do at Animal. Enter the all-new & improved Animal Stak. Building on the legacy built by the original and popular Animal Stak formula, this new and improved version has taken the most potent components of its predecessor, combined it with newer nutrients and cranked it up to the next level. Animal Stak has long been built on being a complete anabolic hormone stack. It’s not just a testosterone booster. It’s also a GH booster and an anti-aromatase. Stak also contains specialized hormone amplifiers and restorative nutrients to optimize ones internal anabolic environment. It is extreme and all-encompassing, just like every pack in the Animal line.