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.
Proteins are body building elements required by the human body. They provide the required energy for the body to function properly and are crucial for the development of muscles. Proteins also facilitate the development of nails, a healthy skin and promote hair growth. Protein deficiency has side effects and can lead to medical conditions.