Don’t use regular venegar like others have suggested. I would recommend apple cider vinegar. Take a tablespoon of apple cider vinegar and mix it with a glass of water and drink before every meal. The apple cider vinegar helps to fight off the intestinal yeast overgrowth by actually killing the yeast, creating a die off reaction. Raw unfiltered apple cider vinegar creates an unfriendly environment for the yeast, while helping create a good environment for friendly gut flora.