蛋白质具有重要的营养价值。首先,人从头发梢到脚后跟,包括皮肤、肌肉、骨骼、内脏、血液……都主要是由蛋白质构成的(占固体成分的45%,数量仅次于水分)。其次,体内很多活性物质,比如酶、抗体、某些激素、血红蛋白、钾钠泵……其实都是蛋白质。最后,蛋白质在一定条件下可以转化为糖和脂肪并提供能量。因此,说蛋白质是最重要的营养素毫不为过。还有,在常见食物中,凡是含有较多蛋白质的食物,如鱼、肉、蛋、奶、大豆、坚果等,含维生素、微量元素等其他营养素也比较多。换言之,只要您通过日常食物(蛋白粉不算)把蛋白质吃够量,那么其他 Protein has important nutritional value. First of all, people from the tip of the hair to the heel, including skin, muscle, bone, internal organs, blood ... are mainly composed of protein (accounting for 45% of solid content, the number of second only to water). Second, many of the active substances in the body, such as enzymes, antibodies, certain hormones, hemoglobin, potassium-sodium pump ... are actually proteins. Finally, under certain conditions, the protein can be converted into sugar and fat and provide energy. Therefore, it is an exaggeration to say that protein is the most important nutrient. Also, in common foods, foods that contain more protein, such as fish, meat, eggs, milk, soybeans, nuts, etc., contain more vitamins, trace elements and other nutrients. In other words, as long as you eat enough protein through daily food (protein powder is not counted), other