Click on the banner at the bottom of this page - the one with the big sunflower.I use Ibsacol, so do lots of others. I don't recall seeing anyone say "I have used it for over a month & it doesn't work", so I guess it's pretty good. It does take a while to start working - about a month for me.Try doing a search on Ibsacol in the ibsgroup archives & you'll find lots of info.