I was taking raw vitamin code probiotics for awhile. I was using the one for women which was the amount of 85 billion. It didnt do anything for my female issues, but it did help a lot with regularity and flare-ups. I wanted to try the same products, but a higher amount so I went to the 100 billion with the same company. I had to come off of it because it was doing nothing for me; especially when I started to take anti-fungals and receive ozone therapy. so I switched to Healthforce probiotics. Yes it is expensive ($50), but it is really good so far. It has prebiotics and herbs to heal the gut. It also has 100 bilion. You can get it from wholefoods; I dont trust getting it from online because it is not kept cold.