Not sure about the "science" behind this, but this technique has definitely worked for me. I've been drinking ~3 litres of water daily for the last year - and along with other changes in my lifestyle, have lost ~65lbs in that time.
If for no other reason, drinking that water reduces my urges for fizzy drinks - which helps a lot. Additionally, as others have said - reducing the amount you eat, in whatever way that works for you, has helped a lot.
If for no other reason, drinking that water reduces my urges for fizzy drinks - which helps a lot. Additionally, as others have said - reducing the amount you eat, in whatever way that works for you, has helped a lot.