Supplementing protein in the morning is the easiest to absorb. But protein powder is not suitable for eating on an empty stomach. Protein is also an energy nutrient. When fasting blood sugar is low in the morning, protein decomposes a lot to generate heat, which is not a more important function. On the one hand, it is a waste. On the other hand, protein's kidney decomposition will increase the burden on the kidney. The best way is to eat some porridge, steamed bread or steamed bread first, so that the body will give priority to these foods as a source of heat, and then make a cup of protein powder with milk or water, so that protein is more meaningful.