Avoiding Surcharges. Because airlines charge a peak travel day surcharge on the most popular days of travel -- Sunday, Monday and Friday -- you can get the best discounts on those off-peak days. However, during the summer, peak and off-peak travel days do not really exist.
Proteins are essential nutrients for the human body. They are one of the building blocks of body tissue, and can also serve as a fuel source. As a fuel, proteins contain 4 kcal per gram, just like carbohydrates and unlike lipids, which contain 9 kcal per gram.
Like all proteins, whey protein is made of building blocks called amino acids. Protein in the body is primarily used for muscle growth and to repair tissues. When people digest food, they break down the proteins into amino acids, and then use those amino acids to build new proteins.Body builders prize whey protein as a good source of the amino acids leucine, isoleucine and valine.rotein in the body is primarily used for muscle growth and to repair tissues. When people digest food, they break down the proteins into amino acids, and then use those amino acids to build new proteins. Body builders prize whey protein as a good source of the amino acids leucine, isoleucine and valine.