Forget chewing gums and mint to freshen up the taste in your mouth! Coffee beans could help you get rid of bad breath! Coffee bean extracts can help prevent the build-up of bacteria, according to a new study by researchers from the Tel Aviv University in Israel. Until now, it was a known fact that coffee when mixed with milk does cause bad breath as it begins to ferment smelly substances in the mouth. Therefore the answer lies not in coffee but in the way you drink it. Research is in the works about which part of the coffee bean could be used as an ingredient in mouth fresheners. The next time you binge on too much of onion and garlic, chew on some roasted coffee beans to change your taste and freshen up your mouth.