Your body needs carbs for fueling your workouts. Complex carbs are the best fuel for your body and brain. Complex carbs come from grain foods. They are a great source for long-term energy. You should strive for at least six to 11 servings of grains.
Most people fall short on grains, but get more than enough protein in their diets.
A balanced diet based on the Food Guide Pyramid. You'll have more success with a high-fiber, low fat diet with at least 30 minutes of exercise daily. Fad diets typically eliminate certain foods or groups of foods. They are not an effective way to lose weight for good. Nutrient deficiencies are just part of the picture.