Fennel (Saunf) is used as a mouth freshener, but it also helps you digest all the heavy meals you’ve had. Fennel water is highly effective in curbing the symptoms of constipation, bloating and a few other gastric disorders. One of the benefits of saunf water is the fact that it is a well-known appetite suppressant. Fennel Water helps in weight loss also. Fennel Water is a good source of Vitamin A, thus it helps improve eyesight. And,a lot more benefits.