以丙酮酸钙和l-肉碱为主要原料，以咖啡溶液为载体，通过试验，解决了丙酮酸钙的增溶问题以及减肥咖啡饮料的口感调配，确定饮料的最佳配方（以200 mL计）为：丙酮酸钙2.5 g、左旋肉碱0.5 g、咖啡1.8 g、麦芽糊精5 g、增溶剂0.66 g、黄原胶0.08 g、酪蛋白酸钠0.5 g、甜味剂（木糖醇6 g、甜蜜素0.35 g）、消泡剂0.10 g、香精0.003 mL。另本文还探讨了减肥咖啡饮料对大鼠体重及血清中的TC、TG、HDL-C浓度的影响。将Wistar雄性大鼠随机分为高、中、低三个剂量组和一个对照组，分别对高、中、低三个组以人体推荐剂量的20倍、10倍、5倍进行灌胃。实验结果显示，与对照组相比，低剂量组具有使大鼠体重下降的趋势，且明显降低血清甘油三酯的浓度。动物实验表明本试验研制的速溶减肥咖啡饮料具有一定的减肥作用。

This paper studied the preparation of the instant coffee beverage with weight-reducing function which used Calcium pyruvate and l-carnitine as main materials. In addition, the problems about improving the solubility of calcium pyruvate and the taste of the instant coffee beverage were solved. The best formula of the functional beverage (per 200 mL) were : 0.5g l-carnitine, 2.5g calcium pyruvate, 1.8g coffee, 5g malt dextrin, 0.66g Solubilizer, 0.08g xanthan gum, 0.5g sodium caseinate, 6g xylitol, 0.35g cyclamate, 0.10g defoamer and 0.003mL flavor. This research also studied the effect of the coffee on rat weight and its TG、CHO and HDL-C concentration in serum. In the animal experiment, the Wistar male rats were randomly divided into high, middle and low dosage groups and a control group. For the former three groups, they were separately fed with different dosage of the instant coffee beverage (20, 10 and 5 times higher than the recommended dose, respectively). Compared with the control group, the rat weight of low dosage group showed a decreasing tendency, and the concentration of TG was also obviously decreased. This study confirmed that this instant coffee beverage had significant effects of losing weight.