Hello, GettingOlder. You are wise to first visit a specialty store for this as there are so many to choose from and it can become difficult to know what to choose. All probiotics are not the same. Important to note that VSL3 probiotics should always be refrigerated. And yes, they all seem to have a high price tag. Amazon does carry VSL3 probiotics, several options. I would look at this site page to see some comparisons of prices. https://www.dietvsdisease.org/probiotics-ibs/ One area often overlooked in probiotic usage is prebiotics. Do you do anything with that? This is usually fermented food/drinks prior to taking the probiotic.