The results revealed that the 4 - HydroxyIsoLeucine + creatine group gained the same amount of lean body mass (LBM) as the creatine + dextrose group in 8 weeks. (mpasupps.com)
During the trial period, the creatine group gained 0.92 kg, the HMB group gained 0.39 kg, and the creatine and HMB combo group gained 1.54 kg. (bodybuildingforyou.com)
In a 3 week Polish study, 40 participants were randomized to a placebo group, a creatine group, a HMB group (3g / day), and a creatine and HMB combo group. (bodybuildingforyou.com)