They took a group of 41 volunteers and had them drink 17 ounces of water before each meal over a 12 week period. They were only allowed to drink plain water, whether it was from a bottle or the tap. The volunteers that stuck to this regimen lost an average of 9.6 pounds during the 12 weeks. Those who only remembered to drink water before one meal lost an average of 1.8 pounds during the 12 weeks.
“I think they could be right. There must be some science behind it if you drink a lot of water it will probably help your metabolism,” said Kukuli Micaela, an American River College student. “Also, if you are drinking some other than sugary drinks during your meal, you are cutting out so much sugar.”
The researchers also asked a group of 43 volunteers to imagine being full before sitting down to eat. This group lost an average of 6.7 pounds.