I'm a nutritionist and GAPS practitioner and am so happy to have discovered Joette Calabrese courses. I took the allergies course and the information is so valuable. My husband suffers from severe migraines and although I've had moderate success with nutrition, these protocols have been the final nail in the coffin. I was deciding between two protocols and when i described silica headaches to my husband he was shocked that they PERFECTLY described his headaches. Silica 200 has worked so well. Whenever a headache comes up, it stops it in its tracks! Can't wait until he never has another headache! Update: A week later he came home for a lunch break with a 10/10 migraine and silica brought it down to a 0 within the hour!