Complex carbs, lean proteins, and healthy fats that come from whole foods are all essential in the appropriate proportions, because together they contain the building blocks of your life. They nourish us at the cellular level.
Foods like rice and whole grains and vegetables provide carbohydrates, which your body turns into glucose, to give you energy. Fish and poultry and beans offer protein, which your body breaks down into amino acids to repair muscles. Healthy fats like nuts and olive oil give your body the essential fatty acids that it needs to absorb vitamins and minerals and keep you healthy.