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These nutrients are the essential material basis for human growth and development and life-sustaining activities.
1, water
It accounts for 70% of the human body and guarantees 8 glasses of water every day. It is the cheapest detoxifying and beautifying agent.
2. protein
It accounts for about 20% of the human body and is used to make muscles, blood, skin and many other body organs. The sources of food are fish, meat, beans, eggs and milk. Women need about 55 grams of protein every day, men need about 65 grams, and children need about 40 grams.
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3. Fat
It is one of the important nutrients necessary for human body. Together with protein and carbohydrates, it is called the three nutrients of productivity. Generally speaking, 70% of human energy comes from carbohydrates and about 20% from fat, but on an empty stomach, more than 50% of energy is obtained through fat oxidation. The source is pure oil, such as cattle, sheep oil, lard and all kinds of meat, eggs and hard fruits.
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4. carbohydrates
Also known as sugar, it is a big family in nature. Scientists have listed nine kinds of carbohydrates closely related to human life, which are divided into monosaccharide, disaccharide and polysaccharide. The source is pure sugar, such as maltose, honey, brown sugar, white sugar and grain.
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5, vitamins
It is a group of organic compounds found in food, which is very important for cell metabolism, body growth and health maintenance. It contributes to the absorption and utilization of other nutrients and helps to form blood, cells, hormones, genetic materials and chemicals in the nervous system. It is divided into fat-soluble vitamins A, D, E and K and water-soluble vitamins B and C. ..
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6. Edible fiber
It is a kind of carbohydrate that the human body can't digest and can't provide energy. It is responsible for regulating the digestion and absorption function of the stomach, helping to prevent colorectal cancer, reduce cholesterol, prevent constipation and help to control weight. It exists in fruits, vegetables, whole grains and seeds. Eating only one kilogram of fruits and vegetables every day can provide the vitamins and cellulose needed by the human body.
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7. minerals
It is the simplest inorganic element. More than 20 kinds of essential inorganic salts have been found in human body. About 4-5% of the human body, such as calcium, magnesium, phosphorus, sodium, potassium, chlorine and sulfur. The daily demand is more than 100 mg, which becomes a macro element, while iron, zinc, selenium, copper and chromium are all trace elements.