In general, Tmall's basic products are genuine and the price is relatively high. If you want to buy good quality and low price, go to Taobao to buy it. If you are in a supermarket, don't go to the supermarket to buy it, especially the brand you haven't heard of. This thing has absorption problems. My suggestion is that you can practice first, and then choose matching supplements according to your training intensity after entering the state. We can start with protein powder.