hiIts worth remembering that it isnt the quantity of probiotics that you take it is the stable quality of teh bacteria that is the important bit. you could take 500bil a dose and only receive the benifit of a couple hundred mil if teh integritry of the bacteria has been compromised during production. it may also take a fair amount of trial and error to find a strain or a cocktail of strains that wioll give you benefit.th eonly way to be sure is to try it and see!CheersIan