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Nutrition Introduction


Fat--


The main functions of fat are to supply energy, promote the absorption of fat-soluble vitamins A, D, E, K, reduce the loss of body heat and protect viscera from damage.

The daily needs of fat for a baby is 4 g/kg of body weight; for more than 4 years old children, 2.5 ~ 3 g. Fat provides 9 kcal energy and the energy from fat accounts for 30% ~ 50% of total calories per day. 



Cholesterol---


Cholesterol can generate cholic acid and is the important component of the synthesis of various hormones in the body as well as the cell membranes. Human body should take appropriate cholesterol every day. High cholesterol can bring about sclerosis of arterial congee and cause cardiovascular disease, even death, seriously. Low cholesterol can cause reduced immunity and increased prevalence. The content of cholesterol at the levels between 140-199 mg each unit of blood is relatively normal. 



Sodium---


Proper sodium intake can ensure the water balance and maintain the acid-base balance in the body as well as be conducive to regulating cardiac muscle and nerve. Recommended sodium intake per day is 1500 to 2300 mg.


Carbohydrate---


Carbohydrates are important substances to constitute the body. They store and provide heat for the human body and maintain the functions of brain. It can regulate fat metabolism, provide dietary fiber, save protein, detoxify as well as enhance bowel function;

A human body should take at least 50 ~ 100 g of digestible carbohydrates everyday to prevent carbohydrate deficiency.



Dietary Fiber---


Adequate intake of dietary fiber can protect intestines and stomach, eliminate toxin and beautify skin, reduce excess caloric intake and inhibit the absorption of fat as well as reduce the prevalence of colon cancer. The world's food and agriculture organization (FAO) recommended daily intake of dietary fiber is 30 g. 


Sugar---


An adequate intake of sugar can maintain normal physiological function of the body and promote the growth and development. Sugar can also help control temper, and to provide energy, promote the metabolism and do detoxifications. Eating too much sugar can bring about the diseases such as obesity. The absorption up to 30 g of sugar a day is harmless to human body. Appropriate candy or chocolate can help eliminate fatigue and relieve pressure during the body fatigue. But remember not to eat too much, or it would be easy to cause other diseases. 



Protein---


Protein is the important component of the synthesis of human tissue protein and the substance to constitute a variety of important physiological function in the body. It supply the body with energy, 1 g protein can produce 4.0 kcal (16.7 kJ) energy. Daily intake of protein for general people should be 0.8 g per kilogram of the body. Too much protein can cause excessive intake of sulfur-containing amino acids, which can accelerate the loss of calcium in the bones and be prone to osteoporosis.



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