The original, pro-hormone-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 Animal have always strived to do… enter the all-new and improved Animal Stak. Building on the legacy achieved 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 muscle stack.