Yogurt contains acidophilis (a friendly bacteria) which can kill yeast infections,if you eat lots of yogurt ,you can clear up an existing yeast infection and prevent new ones from occuring ..Also if you eat lots of garlic,this will help too.It has been ten years now, and I never got another one.
If you do not like how yogurt tastes you can buy acidohilis at a health food store in pill form,the same applies for garlic.