- Excellent absorbability- Improved muscle resistance to fatigue- Ultra-pure liquid HMBHMB Liquid is the highest quality formula containing ultra-pure liquid HMB. The body falls into a deep catabolic state after each bout of strenuous exercise, damaging muscle proteins. Hydroxy Methylbutyrate (HMB) is formed as a counteraction to this process. It inhibis catabolic enzymes and increases the contribution of fat tissue to generating energy. HMB improves muscle resistance to fatigue and promotes faster growth of muscle tissue and reduction of subcutaneous fat.