Yes, Pylopass is allergen free and is an inactive strain of L. reuteri. The strain simply goes into the stomach and binds to a specific stomach bacteria. I hope this helps! I would suggest you also look at using Toxaprevent alongside. Toxaprevent binds and detoxes histamine from the body, in doing so we are able to reduce the histamine and balance your histamine levels. I would recommend the Toxaprevent Medi Plus Sachets.