<h1 class="pgc-h-arrow-right" data-track="3" > source of life, water</h1>
Water is an important part of the human body, such as 80% of the weight of the human brain is water. In stages, the water in the body of infants accounts for about 80% of body weight, adults account for about 60%, and the elderly only about 55%. Therefore, the process of human aging is actually a process of gradual loss of water in the body. At the same time, fat also affects the amount of water in the body, and the greater the degree of obesity, the less water content in the body. For example, in thin adults, water accounts for 60 to 70% of body weight, while in obese adults, water accounts for only 45% to 55%. In addition, exercise also has an impact on the water content in the body, according to studies found that other conditions of the same situation, the athlete's water content is higher than that of non-athletes.
<h1 class="pgc-h-arrow-right" data-track="39" > water loss ratio control</h1>
1% loss of water: thirst
Loss of 2% of water: a feeling of intense thirst, and loss of appetite, unexplained sensations of discomfort
3% loss of water: decreased blood volume, impaired bodily functions
4% loss of water: increased body load, nausea
5 to 7% loss of water: difficulty concentrating, thermoregulation dysfunction
8 to 10% loss of water: dizziness, possible difficulty in moving, increased feelings of weakness, muscle cramps, insomnia, loss of renal function.
<h1 class="pgc-h-arrow-right" data-track="40" > water balance</h1>
If the body water balance is out of balance, it can lead to catastrophic consequences. The amount of water ingested every day is basically equal to the amount of water discharged every day, and the water needs to be balanced in the body. The body's gastrointestinal tract, kidneys, and brain are regulated to keep the body's water in equilibrium. Hypothalamic hormones regulate the body's feeling of thirst, which is a strong signal that stimulates drinking water. In general, adults need to consume 2300ml of water per day (but also 2300ml of discharge), in hot weather need to consume 3300ml of water, if you exercise for a long time, the water demand should be doubled.
Water intake includes all sources of water, such as direct water and beverages; direct water from food; and metabolic water produced by food oxidation in the body.
Water can be excreted through the kidneys and digestive tract in the form of urine or feces, or through the exhaled air from the lungs and the evaporation of water vapor from the skin. In general, the gastrointestinal tract secretes 7 to 9 L of digestive juice, most of which is reabsorbed in the colon and ileum. This reabsorbed amount of water is twice the amount of plasma, so gastrointestinal problems such as diarrhea can lead to dehydration of the body due to excessive loss of digestive juices, with serious consequences. When water cannot be absorbed through the gastrointestinal tract, it is necessary to supplement salt solutions, glucose solutions, parenteral nutrient solutions and the like through the intravenous route that are close to the electrolyte content of body fluids.
<h1 class="pgc-h-arrow-right" data-track="41" > the moisture content in food</h1>
Water is not only an important component of the human body, but also an important component of food. The water from the purified water is easily metabolized and excreted from the body, and the water from food can prevent the rapid loss of water in the body, which is beneficial to health. Therefore, in ambient weather, about 30% of the water required every day needs to be derived from food. In general, the moisture content of fruits and vegetables is higher than that of other foods.
<h1 class="pgc-h-arrow-right" data-track="42" > the proportion of water content of ordinary food:</h1>
100%: water, sugar-free beverages, original tea; 95~99%: lettuce, celery, cucumber;
90~94%: watermelon, strawberries, grapefruit, tomatoes, spinach, skim milk;
80~89%: sugary drinks, whole milk, yogurt, egg white, carrots, apples, oranges, grapes, rice (wet);
60~79%: potatoes (boiled), bananas, shrimp, lean tenderloin, rice (partially dry), corn (boiled); 40~59%: sausages, dietary cream, chicken, cheese macaroni;
20~39%: bread, cake;
10~19%: butter, cream, salad dressing;
5~9%: peanut butter, popcorn;
1~4%: salty biscuits, white sugar, crisp noodles;
0%: cooking oil, shortening, fatty meat;
Water is very important to the human body, it is best to develop the habit of intermittent drinking, do not wait until thirst to drink water, because when the brain sends a signal of thirst, in fact, the body is already in a state of 1% dehydration. Especially in older people, reduced sensitivity to thirst increases the risk of dehydration or dehydration. Dehydration for too long will not only cause a decline in physical fitness, metabolism, and resistance, but also make the skin lose its luster and elasticity, become dry, dull, and wrinkled. Friends want to maintain a young body, insist on drinking enough water, after all, people are made of water.