The first grains I got won on ebay. After that I get them from my friends who I had given them to.
I got the bloating and cramping with kefir. I took it real slow. I took the Primal Defense and I think that the kefir is alot stronger, When I was really ill I only took 1 TBS a day, that is all I could handle. Now I can take 2+ cups with no problems. In fact now it will stop the gas and bloating.
Here is some information on kefir that I found very interesting http://healingcrow.com/ferfun/conspiracy/conspiracy.html