Burning protein is not an efficient process, nor is protein the preferred fuel for the body. Fruit and vegetables are not encouraged or promoted, making the opportunity to obtain necessary vitamins and minerals a limited one. Physical activity has benefits that are well known and advertised. Fuel necessary for muscles to perform activity comes from carbohydrate, and a lack of carbohydrate can result in decreased capacity to perform physical activity, as well as decreased performance of physical activity. Side effects from over consumption of protein include dehydration, bad breath, fatigue and lethargy.
Carbohydrate serves as a precursor to fat burning.
Carbohydrates in the form of breads, cereals, fruits and vegetables contain important vitamins and minerals that can not be obtained through protein consumption. It may be true that many people consume too many carbohydrates. Their availability and recent promotion as a great energy source make them the staple of most meals and snacks. As a result, over consumption of carbohydrate coupled with a lack of physical activity, can contribute to weight gain. However, it may also be true that most people simply consume too many calories, whether they come from carbohydrate, fat or protein, and they are inactive.