Loaded with potent herbs, vitamins, minerals, amino acids and powerful patented compounds, each pre-dosed pack of Animal Stak is designed to naturally enhance the testosterone and growth hormone output of hard-training bodybuilders, all the while minimizing the production of estrogen and cortisol (the gain-killing) hormones. Stak even includes substrates designed to restore endocrine health and amplify endogenous hormonal output. Stak seeks to naturally boost the anabolic hormones linked to power and mass, but to do so without shady ingredients and gray-market compounds.