Animal M-Stak - 21 Paks In a short period of time, Animal Stak has become the world's best-selling, undisputed champion of all "stacked" anabolic training paks. However, due to its potency and certain anabolic ingredients, Animal Stak wasn't suitable for everyone - especially drug-tested athletes. Today, there's a prohormone and ephedra-free alternative to Animal Stak. It's called Animal M-Stak, and it's a powerful new anabolic training pak whose time has come. Thanks to Universal Nutrition's research and development efforts and recent discoveries, Animal M-Stak was born. Animal M-Stak "mimics" the effects of anabolic pharmaceuticals by enhancing protein synthesis, nitrogen retention (positive nitrogen balance), and nutrition-partitioning (diverting more nutrients to lean mass over bodyfat), while simulatneously reducing muscle catabolism (wasting). How? Animal M-Stak can help potentiate your body's production of all five anabolic hormones: (1) Testosterone; (2) Human Growth Hormone (hGH); (3) Insulin-Like Growth Factor 1 (IGF-1); (4) Luteinizing Hormone (LH); and (5) Insulin. Best of all, Animal M-Stak can do this without the androgenic side-effects associated with prohormone use or over-stressing the liver. But Animal M-Stak is more than just an anabolic primer. It can help your body block the conversion of testosterone to estrogen and dihydrotestosterone (DHT); support your liver; increase energy for "unreal" performance; and provide key vitamin and mineral support for your muscles. If you want to be an animal, you've got to train like an animal. Now, you can without all the prohormones or ephedra.