First of all, the raw materials in protein are different. Many supermarkets are made of soybean protein, which is not well absorbed and has extremely low biological value. Even if whey protein is used, the content is different. The protein in the supermarket is 40~50% at most, and most of our fitness foods are in the early 70%. However, most of the protein raw materials used are wpc80 powder, but the addition amount and composition are different. Supermarkets also have cans, which are about 500 grams in general. The price is around 300 yuan, which is converted. Gyms are usually 5-pound barrels, and the price tag is more than 800. In fact, there is a lot of water in the price. You can either make a counter-offer, or find a coach, a salesman or Taobao. The final price is generally between 300-500, depending on the brand of protein powder you buy, whether it is true or not, and the level of sales staff (it will be much cheaper to get the goods if you find a first-class brand agent). But the protein powder in the gym should be divided into true and false, and there are too many cheap fakes now.