Reasonable daily water intake for the human body

Drinking water is the way in which living organisms ingest water through the oral cavity. The human body ingests approximately 2 liters of liquid through the oral cavity every day. Water is mainly absorbed in the small intestine, and after entering the human body, it is mainly used to supplement intracellular and extracellular fluids, participating in various physiological activities of the human body. Therefore, drinking water is an important part of maintaining the metabolism of living organisms. Adults need to drink 1500 to 1700 milliliters of water every day, which includes both water consumed directly and water found in food. In general, it is recommended to drink 1500 milliliters of water per day, which is approximately 4 cups of water in large ceramic cups. Water is the beginning and foundation of life.

The demand for water is mainly influenced by factors such as age, environmental temperature, and physical activity.  The daily urine output of the human body is about 1500 milliliters, and with the loss of water from feces, respiration, and skin, the total water consumption is about 2500 milliliters. Therefore, healthy adults need about 2500 milliliters of water per day, of which drinking water accounts for about 50%, water in food accounts for about 40%, and water produced by metabolism accounts for 10%.  Adults who engage in light physical activity and live in mild climate conditions should drink at least 1200ml of water per day. [2] Under high temperature or strong physical labor conditions, it should be appropriately increased.  When you are sick, especially when you have a fever, you should also drink more water because for every 1 degree increase in body temperature, metabolism accelerates by about 7%. 
The hazards of insufficient drinking water

Reasonable daily water intake for the human body
The hazards of insufficient drinking water
When lacking water, in addition to feeling thirsty, there may also be symptoms such as dry skin, cleft lips, weakness, insufficient urine, dizziness, headaches, and in severe cases, mental symptoms such as fever and restlessness. Insufficient water can lead to dysfunction in gastrointestinal digestion, blood supply of nutrients, and regulation of body fluid concentration. It can also cause lower back pain, deforming knee joint disease, arthritis, and other diseases.
The hazards of excessive drinking water
Excessive drinking of water can cause excessive loss of salt in the human body, leading to symptoms such as dizziness, weakness, and accelerated heartbeat. In severe cases, spasms, consciousness disorders, and coma may even occur, known as water poisoning. However, cases of excessive water or water poisoning in the body are rare in normal individuals and are generally more common in those with abnormal liver, kidney, and heart function.
How to determine water shortage
If you don't know if you're drinking too much or too little water, here's a trick to judge based on the color of your urine. Generally speaking, human urine is light yellow. If the color is too light, it may be due to drinking too much water. If the color is too dark, it indicates that more water needs to be added.

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