To eliminate bad breath, it is essential to identify the source of the problem. Visiting a dentist for an examination can help identify the cause of bad breath. Proper oral hygiene involves cleaning the teeth, tongue, and cheeks. Pay attention to your diet, and avoid sugary foods. Drinking at least 2 liters of water per day can help reduce bad breath. Consuming herbs such as parsley, basil, thyme, and mint can also help eliminate bad odor. Vitamin deficiencies can contribute to bad breath, so it is essential to consume foods that contain the necessary vitamins and minerals. Eating breakfast and avoiding prolonged fasting can help prevent bad breath. It is also important to check for organ deficiencies, such as kidney and liver failure, as well as diabetes, which can cause bad breath.