Is Drinking Too Much Water Beneficial? This Is What Experts Say The amount of water depends on the colour of our urine which should be pale yellowish. Dark yellow colour of urine means the body is dehydrated, while if it is like water, it means water intake is excessive. Drinking one jug of water early in the morning is not good as it increases intraocular tension, and causes headache It also makes us pass urine every 30-60mins, leading to frequent and painful urination and unnecessary bladder trouble. Excessive water intake can also lead to depletion of sodium, creating an environment of hyponatremia, cellular swelling. The percentage of water in a human body is as high as 85% in a foetus and drops to about 50% in the elderly with age. If the climate is hot, or a person is a fitness fanatic then the consumption of water increases. Being up to 2% dehydrated can adversely affect mental and physical health, and more than 15% may have lethal effects. The amount of water for children is 1.3-1.7 l/day while it is 3.7 l/day for men. In women it varies from 2.7-3.8 l/day depending on factors like pregnancy and lactation. Inputs from Dr. Yajvender Pratap Singh Rana, Dr. Navneet Agrawal and Ekta Jain