It is a well known fact that it takes 30 minutes for your stomach to signal your brain that it is full. When you use chopsticks for the first time, you tend to eat slower and therefore eat less. Put it to the test yourself. Here is a tutorial on how to eat with chopsticks. You can purchase chopsticks at any Asian store or pick some up at your local Asian restaurant. Use the chopsticks for 30 days. I bet you just might lose some weight.