For a normal adult, the amount of water consumed in a day is usually 2500-3000ml, which includes the daily drinking water, but also includes the water contained in food, such as rice, soup, porridge and functional drinks, which are all part of the adult daily water intake. However, for people with medical conditions, this amount of water is not a correct and normal indicator. For example, patients with cardiac and renal insufficiency need to reduce their daily water intake by 500-800 ml to reduce the overload on the heart and kidneys caused by excessive water intake. However, for patients with a high basal metabolic rate, such as those with hyperthyroidism, the amount of water required should be increased by 500-1000 ml to meet the normal water intake standards.