Protein powder is a popular nutritional supplement.Protein is an essential macronutrient that helps build muscle, repair tissue, and make enzymes and hormones. Using protein powder may also aid weight loss and help people tone their muscles.
Drinking a shake of whey protein mixed with cold water or milk within 30 minutes of finishing your training session will initiate recovery by flooding your bloodstream with amino acids, which are quickly shuttled into your muscle cells to become new muscle tissue. Protein powder can also be taken at other times.