Can drinking lots of water lower blood pressure?
Drinking water has role in blood pressure maintenance. When a person is dehydrated BP drops initially but later on kidneys reabsorbs more water rather than excreting in urine and vasopressin is released which constricts the blood vessels, both together can increase blood pressure. Hence, every person should drink at least 3 liters of water in a day to prevent dehydration and to maintain BP. One should also note that excess water intake should also be avoided which can put more stress on heart and cause fluid retention in the body.