Water is the source of life, and people's lives are inseparable from water.
In addition, water plays a variety of physiological functions in the human body, including: Water provides a site for biochemical reactions within cellsWater as a carrier for the transport of nutrients and metabolic wastes;Water is a major component of a sophisticated thermoregulatory system;Water acts as a lubricating agent between tissues and joints.
Even if you don't eat and drink water, you can survive for 50-70 days, but if you stop drinking water for 5-10 days, it can be life-threatening. When the body loses more than 1% of its body weight, it will feel thirsty, and at the same time, thermoregulation and physical strength will also be affected;When the water loss exceeds 5% of the body weight, it is difficult to concentrate, and symptoms such as headache, fatigue, and irritability will appearWhen water loss exceeds 10% of body weight, it can be life-threatening.
All of the above are signs of a relatively serious lack of water, and in fact, the body is signaling that you will be rehydrated even if you don't feel thirsty. One of the most straightforward ways to determine the degree of dehydration is by looking at the color of the urine. As for how much water should be consumed each day, the "Dietary Guidelines for Chinese Residents" has given clear recommendations.
A healthy adult needs to consume about 2500 ml of water per day, of which about 1000 ml can be consumed through daily food. At the same time, the metabolism of the three major nutrients – proteins, fats and carbohydrates – in the body also produces about 300 ml of water. Therefore, we need to actively drink water and replenish about 1200 ml of water (about 6 cups).