What reaction will be caused by drinking 3,000 ml of water a day is to be analyzed specifically by the population. Healthy people generally do not have serious reactions, while it may be detrimental to the body for patients with poor cardiac and renal function. 1. Healthy people: In general, the recommended daily water intake for normal people is about 1500 to 1700 ml. If a healthy person drinks 3000 ml of water a day, it can be discharged through urination and sweating. Drinking water tends to lead to increased urination, but there will not be too much reaction, no need to worry too much. 2. heart, kidney function is not good: heart function is not good people, drink 3000 ml of water a day, will make the water in the blood vessels increase, easy to increase the probability of inducing heart failure. For people with poor renal function, a day intake of 3000 ml of water, increasing the burden of kidney excretion, so that the kidneys are uncomfortable, while increasing the probability of triggering edema and other diseases. It should be noted that the heart, kidney function is not good people if drinking too much water leads to physical discomfort, should be timely medical treatment, so as not to delay the condition.