Sorry, I was trying not to advocate for any particular brand in this space. There are quite a few on the market and I don't have direct experience with more than a handful. They are all plant parts, dried, crushed to a powder, and put in a capsule. I have used Biotics Research (Dysbiocide and FC Cidal) and my son was prescribed a 90 day course from a different brand (don't remember off-hand). I'd suggest consulting with a naturopath, if you can find a reputable one.