One 90 count bottle of MET-Rx HMB 1000 Dietary Supplement Specialty supplement that may help support strength levels and muscle support when used in combination with weight training (1) These workout supplements are formulated to contain four times the HMB per capsule compared to our previous HMB supplement formula HMB muscle supplements are believed to work by helping to maintain the structure of muscle cells after exercise (1) MET-Rx HMB capsules 1000mg supplements are ideal for athletes and bodybuilders