There are six best time periods to drink water a day: first, the best time in the morning half an hour after waking up, rather than drinking water immediately after waking up, usually in the morning 6:30-7:00 or so, can accelerate the metabolic rate in the body to promote the production of pancreatic fluid toxic substances out of the body; second, the best time is 9:00-10:00 a.m., this time to replenish the water consumed by the morning workload; third, the best time to drink water a day The best time to drink water at noon after 30 minutes after lunch, can replenish the thirst generated by excessive intake of sodium chloride and salt during lunch, but not immediately after eating; fourth, the best time to drink water in the afternoon is 16:00-16:30, can replenish the excess water consumed in the body during the afternoon work; fifth, the time to replenish water is usually at 18:00-18:30 is the best time to replenish water in the evening The sixth, the best time to replenish water is one hour before bedtime, usually around 21:00, but two hours before bedtime is best not to drink water, especially not too much water.