营养与健康（Nutrition and health）.doc

营养与健康（Nutrition and health） Nutrition and health 1 nutrients needed by human beings Humans diet every day to gain nutrients. So what are the nutrients that humans need? 1.1 protein A complex compound consisting of a variety of amino acids. It is the basic substance that makes up cells, and is the main raw material for the growth and repair of damaged tissues. It is the bodys largest nutritional requirement. Its major sources are meat, eggs, milk, and certain plant seeds. 1.2 carbs It is the main substance of organism function, providing the energy needed for human life to grow and move normally. It mainly comes from rice, wheat, corn and so on. Water accounts for sixty percent to seventy percent of the body. It mainly provides the liquid environment for the organism metabolism, dissolves each kind of substance, guarantees each organism metabolism to be normal. Human beings cannot survive without water. 1.3 lipids Is the bodys main energy storage material, known as the life of standby energy, the release of energy is about two times the sugar. At the same time, the fat in the human body can reduce the friction of organs in the body, and the organs earthquake resistance. It is mainly derived from animal and vegetable fats and dairy products and so on. 1.4 vitamins Its variety is mainly to regulate the body of Chen Daixie, prevent disease, and maintain good health. Some are absorbed from the outside world, such as vitamin A; some can only be synthesized in the body, such as vitamin D. The body has a small demand for it, but it cant be short of it. Its main sources are fruits, vegetables, seeds, food, animal liver and so on. 1.5 minerals have a wide variety, but they are important to the body. It is involved in the formation, organization and regulation of enzyme active factors, which can regulate cell metabolism, hormone secretion, acid-base balance, and so on. 2 health and nutrition Health refers to a person in physical, mental and social aspects are in good condition