Baking Soda
According to studies, baking soda is highly effective in reducing or eliminating garlic and onion breath. All you need is one or two teaspoons of baking soda and one cup of warm water. You will add one or two teaspoons of baking soda to a cup of warm water, mix properly and use the solution to wash your mouth thoroughly. It would help to wash your mouth with this solution more than twice daily, especially after each meal.
Baking soda is effective in treating bad breath because it has antibacterial features. When bacteria acts on sulphur-containing compounds from garlic, onion, or other foods, it leads to bad breath. Baking soda [1] helps eliminate bad breath by attacking the bacteria in the mouth.