Disclosed are nutritional emulsions comprising fat, carbohydrate, protein, and calcium HMB, wherein the nutritional emulsion has a weight ratio of a soluble calcium binding capacity to soluble calcium of from about 2.3 to about 12.0. Also disclosed are nutritional emulsions comprising fat, carbohydrate, protein, and calcium HMB, wherein the nutritional emulsion comprises less than 900 mg/L of soluble calcium in a weight ratio of calcium HMB to soluble calcium of from 6:1 to 15:1. The nutritional emulsions are surprisingly stable and generate minimal or no bitter flavors or after taste over time.