Instead those wishing to lose weight should try eating more foods which contain water, like fruit, vegetables, rice and soups.
In a study the weight and waistlines of more than 1,000 young women were compared with the amount of water they consumed each day from both food and drink.
Women who ate more water-rich food tended to have a slightly smaller waist size and lower body mass index, meaning they were healthier weights for their heights.
The study showed that drinking water alone had no effect on the women's weights, the science journal Nutrition reported.
"These studies suggest that when water is consumed as an integral component of a food, it promotes satiety and decreases subsequent dietary intake, thus possibly working to prevent obesity," researchers from the University of Tokyo said.
They said it could be due to the fact that foods that contain water are also high in fibre and so make people feel more full after eating them.
Earlier studies had suggested that people needed to drink eight glasses of water a day to stay healthy, keep slim and maintain good skin.
But the American scientists said there was no evidence to support this and most people get all the fluids they need from food and other drinks like tea and coffee.
article from Telegragh.co.uk
(I knew this just because this whole time I have been losing weight, I have always felt guilty that I wasn't drinking enough water. Yet, here I am 33 pounds thinner and I never got my 8 glasses in a day. I love coffee, and caffeine free diet coke, milk and yes I have water, but maybe 2 big glasses. LIke the article says though, I love soup, fruit, veggies...lots of high fiber high water content foods.)