Fats and oils are an intense source of energy. Fats in the diet are necessary for good health. They make certain vitamins available for use in the body, they reduce essential organs, they make up part of all body cells, and they help to maintain body temperature.
Fats, oils, and sweets are the fat foods and are not consumable to diet persons, as they consist of high calories. Fats and oils like salad dressings, mayonnaise, butter, margarine and lard tend to be high in calories because of the fat they contain.
Sweets like candy, soft drinks, syrups, jams, and jellies are made mostly of sugars. Most of these foods do not contain many vitamins or minerals. So they are called "empty calorie" foods. They should be eaten only cautiously.
When we eat oily, sweets along with foods like grains, fruits, vegetables, milk and meat products they are part of a healthy diet. Eating too many fats, oils or sweets can cause a problem to a health person like raises blood cholesterol levels in many people, increasing their risk for heart disease etc. All fats in foods are mixtures of three types of fatty acid – saturated, monounsaturated, and polyunsaturated.