When it comes to building muscle, you've got to work both sides of the street; training hard is only effective if you "recover hard" and do whatever you can to maintain muscle mass and reduce catabolic muscle breakdown. That means plenty of protein and the right balance of amino acids. It's long been known that branch chain amino acids like leucine are important for their muscle sparing and anticatabolic effects. Research into these effects led to the discovery of ß-Hydroxy ß- Methylbutyrate Monohydrate, better known as HMB. EAS was the first sports nutrition company to offer HMB as a supplement and it remains the best-seller. You use HMB to sustain the muscle growth you've worked so hard to achieve. HMB works through several mechanisms that promote protein synthesis within muscle, while inhibiting muscle break down. EAS HMB is a great supplement for hard gainers, over-trainers or any competitive fitness athlete who needs to maintain muscle mass while reducing calorie intake. People use from 1-3 grams per of HMB per day (1000-3000 mg), usually in 2 divided doses, but for best results we suggest you start with 3 g per day and stay there.