Nowadays, many health websites promote that adults should drink eight glasses of water every day, and there is also a specific timetable for drinking these eight glasses of water online. This timetable also explains in detail the different health care functions of drinking these eight glasses of water at the corresponding time.

Rumors:

A healthy adult needs to supplement about 3000 ml of water every day, including the water he drinks directly every day and the water contained in his diet (soup, porridge, fruits, vegetables, etc. ), and about 300 ml of metabolic water produced by the human body. So, don't insist on drinking eight glasses of water every day. People who eat more soup, fruits and vegetables every day can drink less water. There is also a simple way to estimate how much water you need every day, that is, 24 hours of urine plus 500 ml a day.

Of course, it must also be pointed out that different people should drink different amounts of water every day:

(1) Middle-aged and elderly patients with common diseases such as congestive heart failure, ascites due to liver cirrhosis and edema due to renal insufficiency should control their drinking water. The principle is not to be thirsty, not to drink too fast, and it is appropriate to swallow with small mouth and low salt.

(2) Patients with recurrent urinary tract infection, urinary calculi, hyperuricemia and fever should drink plenty of water every day, and keep the urine volume above 2500 ml every day, so as to facilitate the discharge of bacteria, urinary tract crystals and metabolites;

(3) People who use certain drugs, such as antibiotics, antipyretic and analgesic drugs and contrast agents, should drink plenty of water.

In addition, it is not recommended to drink water mechanically according to the time point proposed in the rumor. Especially for the elderly, both men and women, it is not recommended that such elderly people drink more water before going to bed, because the kidney is aging, the dilution-concentration function of renal tubules is declining, prostate hyperplasia or bladder function is degraded, which leads to frequent nocturia, and many elderly people have sleep disorders and are prone to various sleep problems.

Rumor expert: Gong Xuezhong, chief physician, professor and doctoral supervisor of the Department of Nephrology, Shanghai Hospital of Traditional Chinese Medicine affiliated to Shanghai University of Traditional Chinese Medicine.

Expert: Yin Mei, Dean, Professor and Doctoral Supervisor of School of Humanities, Harbin Medical University.