Gargle with a small cup of acidic lemon juice to kill odor-causing bacteria. Then eat a bit of plain unsweetened yogurt, which contains beneficial lactobacillus bacteria. These so-called probiotics compete with and replace the reeking bacteria. (They also make you prettier—check it out!) The lemon-yogurt combo instantly neutralizes odor and lasts 12 to 24 hours.
It’s been used for thousands of years in Asian medicine to treat stomachaches, diarrhea, and nausea, and studies show that it works for nausea and vomiting. There’s some evidence that it might help with menstrual cramps, too. But it’s not necessarily good for everyone. Some people get tummy trouble, heartburn, diarrhea, and gas because of it, and it may affect how some medications work. So talk to your doctor, and use it with care.