To stay healthy, your body needs the right balance of carbohydrates, fats and protein, the three main components of nutrition. You also need vitamins, minerals and other nutrients that are contained in many different foods. Eating a variety of different foods is essential because no single food or food group contains all the nutrients that your body requires to function properly. Moderation means that we need to eat neither too much nor too little of any food or nutrient. Too much food can result in excess weight-gain and an excess of certain nutrients, whilst eating too little can lead to nutrient deficiencies and low body mass.So very often it is as important to look at what we are not eating as to look at what we are eating!