Water increases the activity of the sympathetic - fight or flight - nervous system, which raises alertness, blood pressure and energy expenditure.
American Red Cross found in a study, that drinking 16 ounces of water before blood donation reduced the fainting response by 20 percent.
And because it raises sympathetic nervous system activity - and consequently energy expenditure - it does promote weight loss, Robertson said.
The study is reported in the June issue of the journal Hypertension.
Source: ANI
