MET-Rx HMB 1000 is a specialty supplement for athletes and bodybuilders that may help support strength levels and muscles when used in combination with weight training.* HMB (Calcium ß-Hydroxy ß-Methylbutyrate Monohydrate) is a metabolite of leucine, a Branched Chain Amino Acid. Amino acids provide the nutritional base for building protein, and MET-Rx HMB 1000 is formulated to contain four times the HMB per capsule compared to our previous formula. HMB is believed to work by helping to maintain the structure of muscle cells after exercise.* MET-Rx HMB 1000 may support muscle recovery and repair from serious training.* (make sure to use FDA disclaimer with one *, and also add: Use in conjunction with an intense daily exercise program and a balanced diet including an adequate caloric intake.)