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.
In terms of the overall health and function of the human body, protein is essential for building and repairing things. Your organs, muscles, skin, hair, nails, bones and certain hormones are all made up of some amount of protein. Itâs an absolute requirement for sustaining life and proper function.