<<Disclaimer: Verify this information before applying it to your situation.>> For those that are interested. I called Jarrow Formulas 1-800-726-0886 regarding the Saccharomyces Boulardii I spoke to a dietician who said that the yeast is grown in barley and the maltodextrin is from corn, but the end product does not contain barley or corn that's why they have put on the label that it is free of those allergens. Personally, I am viewing his comments the same as I view the whole distilled vinegar saga. Considering my symptoms of cramping, bloating, foggy brain, etc. are SO constant, I am going to try this brand. I will be more than happy to share my experience after a week or so. Also, there are other brands that I did not research - Twin Labs and Schiff. We all have such different reactions, all I can do is share what I have learned and let it up to you, as individuals, to decide what is best in your situation. Michelle in MD