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 the primary building block for your bodyâs tissues. The amino acid chains form different patterns to create different kinds of tissues. Think of it like the raw materials that your body uses to form new muscles. Protein is generally not used as an energy source unless the body has no other option.