How Many Water Should We Drink Each Day

A friend of mine shared her daily stories, Near her room which is located on the second floor of her house contained water dispenser. According to her, she needed the dispenser's because everytime she is waking she would drink at least 4-5 glasses of water.
This she had done since she was a child. The reason, as a child her parents required that she be drinking that much water every morning so that her body is detoxifying. But, is it safe to do this?
On that occasion a press conference of the campaign " Healthy Start from Now" revealed that in one day our bodies need at least 2 liters of water intake in order to keep moving and active. Seventy percent of the organs of our body contains water. The brain contains the most water, so we needed water intake.
When our body is dehydrated, the brain could experience delays in thinking (slow). Not just a matter of cognition (thinking power) is affected when dehydration, but also physical problems and mood. Regarding the habit to drink water after waking, We generally sleep about 6-8 hours every night. During sleep without waking up for it, we do not drink, of course, there was a deficit of water. When sleeping, the body continues to work to repair cells and there is also evaporation.
It is advisable to drink water as much as 2 liters a day. In the morning, so get up, drink 1-2 glass of water is enough. What happens if we drink water in large quantities at once? The water we drink will go to the digestion and is absorbed by blood vessels. When we drink water in large quantities at once, what happens is the blood fluid volume will increase. The blood will pass through the heart and kidneys. That is, sudden cardiac workload increased weight, as well as kidneys. With excessive workload when it is done for many years there will be health problems later in life.
Indeed, each of us need to drink plenty of water, while taking medical tests, such as blood sugar and cholesterol, her impression is not high and look normal. In fact, it could happen because both the volume of dissolved water. The main problem and the value of blood sugar or cholesterol, so it is not detected correctly. Drink 1-2 glasses of water is enough, because the function to return the body fluids lost during sleep, reminded to drink enough water about 2 liters per day, if any excessive activity, can be added up to 2.5 to 3 liters per day by drinking gradually. For example, early in 1 cup (250 ml), after breakfast 1 cup, 1 cup before exercise, after the move to drink again, and continue up to 8 glasses per day until bedtime.
A habit to drink 2 liters per day is not easy, but it is doable and make it a habit. Eventually unconsciously brain will tell your body to take a drink. From now to live a healthy life in order to remain healthy until later in life. Do about 6 -8 weeks in a row is tight, then the body will feel the need to drink automatically.