Nutrition Essay

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Nutrition In humans proteins are needed in large quantities for growth and repair and the body also needs carbohydrates and fats in large amounts for energy. Vitamins and minerals are also needed for a variety of different functions, including regulating the body’s metabolism but it is needed in much smaller amounts. Water is a vital part of a human’s diet and so is dietary fibre (roughage) as it is necessary for efficient digestion. Carbohydrates – main function is to provide the body with energy. There are two types of carbohydrates - starchy (complex) carbohydrates and simple sugars. The simple sugars are found in confectionery, cakes and biscuits, cereals, puddings and juices and jam and honey but they also contain fat. Starchy carbohydrates are found in potatoes, rice, bread, wholegrain cereals, semi skimmed milk, yoghurt, fruit, vegetables, beans and pulses. Both types effectively replace muscle glycogen. The starchy carbohydrates are the ones that have all the vitamins and minerals in them as well as protein. They are also low in fat. The starchy foods are much more bulky so there can be a problem in actually eating that amount of food so supplementing with simple sugar alternatives is necessary. Your digestive system converts the carbohydrates in food into glucose, a form of sugar carried in the blood and transported to cells for energy. The glucose, in turn, is broken down into carbon dioxide and water. Any glucose not used by the cells is converted into glycogen - another form of carbohydrate that is stored in the muscles and liver. However, the body's glycogen capacity is limited to about 350 grams; once this maximum has been reached, any excess glucose is quickly converted into fat. Base your main meal with the bulk on your plate filled with carbohydrates and small amounts of protein such as meat, poultry and fish. Fats

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