Eating plain yogert can help, but it needs to have active cultures like Activia or Stoneyfield farms. Most of what is sold in stores is pasturized and all the good bacteria has been killed.
It needs to be plain because most yogert has a ton of sugar and yeast feeds off sugar, so if you eat a sugary yogert you will just be making the yeast stronger and the yeast will kill all the good bacteria the yogert contains.