Fatty acids and glucose are the primary metabolic fuels used by higher organisms, including man. As such, fatty acids occupy a central position in human nutrition. Fat, carbohydrate, and protein comprise the macronutrients. When nutritionists speak of fat, they are referring mainly to triacylgly-cerol (triglyceride), which consists of three fatty-acid molecules covalently linked to a backbone of glycerol. Several properties of fatty acids and tria-cylglycerol make them highly suited to the storage and provision of energy. When a gram of fatty acid is burned as fuel, about 9kcal of energy is recovered - more than twice that yielded when a gram of carbohydrate or protein is utilized. Unlike carbohydrates, fat can be stored in an anhydrous compact state, allowing the organism to amass large quantities of fuel reserves in times of plenty. This property can have unfortunate consequences in prosperous societies, as evidenced by the increasing incidence of obesity. Fatty acids are also fundamental building blocks for the synthesis of most biologically important lipids, including phospholipids, sphingolipids, and cholesterol esters. They are the precursors of bioactive molecules such as prosta-glandins and other eicosanoids. In addition, fatty acids and their coenzyme A derivatives have many metabolic regulatory roles.

Good Carb Diet

Good Carb Diet

WHAT IT IS A three-phase plan that has been likened to the low-carbohydrate Atkins program because during the first two weeks, South Beach eliminates most carbs, including bread, pasta, potatoes, fruit and most dairy products. In PHASE 2, healthy carbs, including most fruits, whole grains and dairy products are gradually reintroduced, but processed carbs such as bagels, cookies, cornflakes, regular pasta and rice cakes remain on the list of foods to avoid or eat rarely.

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