Relationship between nutrition and health
Nutrition is the material basis for human health, development and life, and the essential proteins, fats and carbohydrates (sugars). In addition, there are three components of vitamins, inorganic salts (minerals) and water.
Protein - is the basis of human growth and development. It is mainly derived from fish, meat, poultry, eggs, milk and whole grains. The average person needs about 80 grams per day. Its main focus, in addition to promoting human growth and cell metabolism, regulating physiological functions, and enhancing resistance to disease, can also provide calories (heat energy). If protein is lacking, body weight will be reduced, fatigue, developmental delay, susceptibility to anemia and nutritional edema, and it will not be easy to heal if there is trauma and fracture.
Fat is an important part of the human body and one of the important sources of human thermal energy. Under normal circumstances, 1800 to 2400 calories per day (9 calories per gram of fat), and 60% of the body's fat is obtained from the fat of animals and plants. Vegetable fat is easier to digest and absorb than animal fat, has low cholesterol content, and contains linolenic acid to enhance the elasticity of microvessels and prevent vascular rupture. Fat can help protect body temperature and promote appetite, while at the same time taking on the task of soluble oils vitamins A, D, E, and K. However, if you consume too much, it will affect the function of the cardiovascular system, so it should be properly controlled to avoid excess. If the fat intake is too small, it is prone to fat-soluble vitamin deficiency, causing other diseases.
Carbohydrates (sugars) - the main source of heat in the body, it helps fat burn and provide heat. 60-70% of the body's heat is provided by carbohydrates in foods (primarily food and sugar). Carbohydrates can be decomposed into glucose after digestion, and are directly absorbed and utilized by various parts of the body to produce heat and energy. According to the measurement, 4 calories can be produced per gram of carbohydrates, and excessive sugar can cause dysfunction, causing obesity, diabetes. , consumes pancreatic cells; otherwise, it loses weight and is prone to fatigue.
Vitamins - are essential nutrients for normal physiological activities in the human body. Generally speaking, as long as they are not partial eclipse, they can ingest the various vitamins needed in daily food. Lack of vitamin A, can cause loss of appetite, growth retardation, dry skin, pathological slowing and affecting vision; lack of vitamin B, in addition to affecting appetite and growth and development, can also cause edema, susceptible to various inflammation; Lack of vitamin E can cause scurvy, subcutaneous hemorrhage, tooth sway, swollen tooth roots, bleeding, rot, fragile bones and fractures.
Calcium, phosphorus, iron and iodine in inorganic salts are the main components of human bones, teeth and hemoglobin, and they are responsible for blood clotting and oxygen transport in the body. These minerals are abundant in various foods and drinking waters and have a certain effect on health and cannot be ignored.