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.
Protein is important to help the body build, repair and maintain body tissues. Protein helps make enzymes, hormones, and other body chemicals to regulate water balance and help make muscles contract. If your carbohydrate consumption is lacking, protein can provide energy.