Originally Posted by Stay Puft
For example, I found it fascinating to watch the water just rush from the stomach after drinking, showing that drinking water before the meal didn't help fill people up. But I wondered if drinking after the meal would have the same effect as soup. Since the water would mix with the food and I think the stomach couldn't just release the water without releasing the food would it help make you fuller?
No, the pyloric valve prevents the scenario that you described (water pushing recently consumed food out of the stomach). It slowly allows food into your intestines (and also prevents bile from backing up into your stomach). Now, in my case, as I've had a gastric bypass, I no longer have the pyloric valve function (it was bypassed), and drinking will push food out of my stomach. As a result, it is recommended that I wait 30-60 minutes after eating to drink, in order to maintain satiety.