I've heard sometimes these different yeasts can be good for keeping others in check etc...let us know how it goes. Would be interested to know if the lactose problem is fixed by this. Years ago I had a really bad bout with food poisioning...had many gut problems after that episode and became lactose intolerant, but never had been before. A naturepath gave me some probiotics and some yeasts...it helped...it's taken years..but I can tolerate alot more dairy then I could then....I'm curious how this product helps you. I hope it does!