Lightheaded after a morning of lots of water might be due to lack of carbohydrates. You body needs energy and water has none.
No, unless you are an athlete or a laborer and sweat away a lot, then you would be drinking Gatorade or something like it, to replenish lost electrolytes. Otherwise we generally get enough salt through the foods we eat.
well do you belive you should be drinking 2 liters of water a day?
because this is the most miss-quoted "fact"
It comes from a report in the 50`s. which says.
"the human body requires about 2 liters of water a day.
However upto 90% of this can come from foodstuffs"
My opinion. if you want a drink have one. you want a lil extra salt do it.
Trust your body...it knows what its doing!