I tried the kefir route and it's to much of a hassle to keep up. Give me an example of live cultures I could implant rectally. I would like to take a probiotic indefinately, that why I asked about a good one to take. I hear I could do this with primal defense but I am not sure. I have a history of constipation from a child and I am now 39 years old so I think I have an imbalance in flora.