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 used is just about every bodily function. They make up muscles, many different types of tissues and cells, etc. Even a lot of bodily fluids are made up of proteins. (i.e. Hemoglobin)The body uses protien to maintain all of the muscles, tissues, and organs in the body. Protiens are made up from amino acids and can also be used to make energy in the body.