PURPOSE: A feed composition is provided to measure general metabolic energy of a food sample which shows a high accuracy on measuring AME. CONSTITUTION: A feed composition comprises: 64-71wt% of carbohydrate, 15-18wt% of casein protein, 5-7wt% of vegetable fat, 1-10wt% of minerals, and 0.5-5wt% of vitamins. The carbohydrate is more than one kind selected from a group comprising starch, maltodextrin, and sucrose. The vegetable fat is more than one kind selected from a group comprising soybean oil, and corn oil. The feed composition also comprises 0.1-21wt% of more than one additive selected from a group comprising 1-10wt% of cellulose, 0.1-5wt% of L-cystine, 0.1-5wt% of cholin, and 0.001-0.1wt% of antioxidant. The feed composition is provided in a form of being mixed with a food sample for measuring general metabolic energy in a ratio of 7:3-9:1wt%.
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