Doctor how much glass of water we should drink in a day ?& please tell what are its benefits for both skin &body.

4-5 GLASSES IN WINTER AND 8-10 GLASSES IN SUMMER. If you do physical activity, requirement may be more. Benefits 1. It restores body water loss due to perspiration and loss in urine. 2. It is essential to maintain water & electrolyte balance in body and to maintain normal osmalality of blood. 3. It increases your perspiration making you feel cold in summer. 4. It helps in reduction of fever by perspiration. 5. It helps in excretion of unwanted metabolites, chemical and drugs from blood in urine. 6. It boosts metabolism. 7. It fastens blood circulation. 8. It prevents stone formation in kidneys and bladder by making urine thin. 9. It prevents burning during urination. 10. It flushes your urinary tract and prevents urinary tract infections (UTIs) 11. It boosts your bowel movements and prevents constipation. Extreme of everything is bad. Excess water intake may cause water intoxication resulting into diminished blood osmolality with water entering more into cells making them to swell and get dead. Specially brain cells start swelling and dying. But this situation does not normally arise during oral water intake but during IV fluid infusions and in oral intake if there is high secretion of ADH (Anti-diuretic hormone = Vasopressin) and after heavy water intake with MDMA (Ecstasy) drug intake in rave parties & clubs due to release of vasopressin. If you are a patient of Congestive heart failure or left ventricular failure or have high ADH secretion, you should keep your oral water intake limited. 12. It improves digestion and absorption. 

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