Do a search of the ‘Net for: MSM allergies You will get many leads to articles similar to the following…
http://www.natural-health-and-healing-4u.com/msm-powder.html What Is MSM And How Do You Use It For Allergies? https://www.nutriteam.com/msm-allergies MSM and Allergies There are books available on MSM. One I have read, and recommend, is: The Miracle of MSM: The Natural Solution for Pain by Stanley W. Jacob This book also discusses using MSM for allergies.

