I spent time browsing past threads on both last night. I can't take MAF878 anyway because of the kefir component required. It is of course much more reasonably priced. But I'm kind of convinced that MAF314 really did go through some rigorous testing to find the probiotic strains that were most efficient at producing GcMAF. Sushi, GcMAF Australia, and ukxmrv, would you agree with this assessment? I know the price on the 878 starter is very reasonable. OTOH... I am of course going to get my nagalase tested first. I have the option to do injectable, starting at a low dose. The reason I prefer a probiotic theoretically is 1) direct effect on the gut and gut immune system. 2) Ability to really self-titrate amounts, by observing response In addition, having read about the Australian doc with a strong colostrum, I can get fresh raw colostrum, first milking, from my Amish farmer. Theoretically that might be beneficial. Anyway I just thought I'd start a new thread on this topic above. Thanks folks!