Disclosed are substantially clear nutritional liquids comprising protein and calcium HMB wherein soluble protein represents from about 65% to 100% by weight of total protein. The liquids have a pH of from about 2.8 to about 4.6 and may be manufactuted as a hot fill product. The substantially clear nutritional liquids may also have a weight ratio of calcium HMB to soluble calcium of from 4.5:1 to 7.3:1. In some embodiments, the substantially clear nutritional liquids are substantially free of fat, and may optionally include isomaltulose and/or beta alanine.本發明揭示包含蛋白質及鈣HMB之實質上透明營養液,其中以總蛋白質重量計可溶性蛋白質佔自約65%至100%。該液體具有自約2.8至約4.6之pH且可製造為熱填充產物。該等實質上透明營養液亦可具有自4.5:1至7.3:1之鈣HMB與可溶性鈣之重量比。在一些實施例中,該等實質上透明營養液實質上不含脂肪,且視情況可包括異麥芽酮糖及/或β丙胺酸。