There are two times when protein is most needed: within 40 minutes after training. Because the secretion of growth hormone is at the peak at this time, the absorption amount is 100% within 20 minutes, and the synthetic ability of the body can reach 20 times of usual. The absorption capacity drops to 50% after 20-40 minutes, and returns to normal after 40 minutes. After getting up in the morning. After a night's sleep, the stomach has been emptied, and the muscles are in a state where catabolism is higher than anabolism. protein is in urgent need of "rescue". If you miss these two hours, you can only say that the efficiency has decreased, but it does not mean that it is useless to drink protein powder at other times of the day. The total daily intake is still a very important indicator. Therefore, the attitude towards the golden window period is: pay full attention, but don't be superstitious.