According to science, our stomach tends to know when we will eat and starts releasing digestive juices at that time and if you drink water at the very same time, the digestive juices are diluted in the water and it hinders them from breaking down food. As a result, less juice is supplied to digest your food and undigested food gets leaked into the system which leads to heartburn and acid reflux. Drinking water during meals also increases insulin levels of your body. The healthy way is to have a glass of water thirty minutes before a meal.
