Protein is an important nutrient for human growth and development,which can promote metabolism,enhance immunity and muscle growth.In recent years,with the rise of nationwide fitness craze,fitness enthusiasts pay more attention to protein supplement as well as exercise.Whey protein and Heilongjiang province"black green No.2"black soybean protein were selected as the main raw materials of this test,the senso-ry quality of products was taken as the evaluation index.Optimization of the process conditions was carried out by the combined use of single factor method and the response surface analysis.Then the optimal amount of xanthan gum,sucralose and lemon extract content in the blended protein sports nutrition powder were determined,and the influence degree of these three substances on the sensory evaluation score was also determined.The results showed that the optimal addition amounts of xanthan gum,sucralose and lemon extract were 0.73％,0.38％and 0.55％.respectively In this case,the optimal sensory score of the product was 19.24 and the solubility of the product was 84.26％±0.94％.
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