Drinking immediately after fitness will stimulate the stomach, so it is best to rest for 20 minutes before drinking. Drinking on an empty stomach immediately after fitness can also be absorbed. Of course, there will be some losses, but it is not big, because whey protein is easily absorbed. In order to absorb it more thoroughly, it is best to take protein powder with some other foods or before and after intake. Even fruits or biscuits can stimulate the efficiency of digestive system and insulin secretion, which is beneficial to protein's absorption.