slimming diet

Fats, or lipids, are the most concentrated source of energy in the diet. When oxidized, fats provide more than twice the number of calories per gram as those provided by carbohydrates or proteins. One gram of fat yields approximately nine calories to the body.

In addition to providing slimming diet energy, fats act as carriers for the fat-soluble vitamins – A, D, E and K. By aiding in the absorption of vitamin D, fats help make calcium available to body tissues, particularly to the bones and teeth. Fats are also important for the conversion of carotene to vitamin A. Fat slimming diet deposits surround, protect and hold in place organs such as the kidneys, heart and liver. A layer of fat insulates the body from environmental temperature changes and preserves body heat. This layer also rounds out the contours of the body. Fats prolong the process of digestion by slowing down the slimming diet stomach’s secretions of hydrochloric acid. Thus fats create a longer-lasting sensation of fullness after a meal.

The substances that give fats their different flavours, textures and melting points are known as the fatty acids. There are two types of fatty acids – saturated and unsaturated. Saturated fatty acids are slimming diet those that are usually hard at room temperature and which come primarily from animal sources. Unsaturated fatty acids, including polyunsaturates, are usually liquid at room temperature and are derived from vegetable, nut or seed sources. Vegetable shortenings and margarines have undergone a process called hydrogenation in which unsaturated oils are slimming diet converted to a more solid form of fat. Other sources of fat are milk products , eggs and cheese.

Cholesterol is a lipid or fat-related substance necessary for good health. It is a normal component of most body tissues, especially those of the brain and nervous system, liver and blood. slimming diet It is needed to form sex and adrenal hormones, vitamin D and bile, which is needed for the digestion of fats. Cholesterol also seems to play a part in lubricating the skin. Although a cholesterol deficiency is unlikely to occur, abnormal amounts of cholesterol may be stored throughout the body slimming diet if fats are eaten excessively.

Although a fat deficiency rarely occurs in man, such a deficiency would lead to a deficiency in the fat-soluble vitamins. A deficiency of fatty acids may produce eczema or other skin disorders. An extreme deficiency could lead to severely retarded growth.

Excessive amounts slimming diet of fat in the diet leads to abnormal weight gain and obesity if more calories are consumed than are needed by the body. In addition to obesity, excessive fat intake will cause abnormally slow digestion and absorption resulting in indigestion. If a lack of carbohydrates is accompanied by a lack slimming diet of water in the diet, or if there is a kidney malfunction, fats cannot be completely metabolised and may become toxic to the body.

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