Sharkey, look at the box or go to the Global Health Trax website for the three strains in Threelac. Then research those strains on the web. Ignore websites selling products containing any of those strains. What do you think? You could probably buy one entire bottle of each strain for what you pay for one box of Threelac. While I don't think it will hurt you, more is not always better. If that was the case I would have just swallowed ten bottles of probiotics at one go and cured my candidasis months ago. Also, I beleive at least one of the strains in Threelac is a transient organism. I not saying it's bad, I'm just saying with a little research you can probably do better. Good luck.