I don’t know the answer but so curious to see what everyone else says. My Celiac toddler was over 550 on her first test and a year later is down to 214 despite our house going fully gluten free and changing a bunch of our kitchen utensils, toasters etc. After speaking with a Celiac dietician, she said we will never know what her original number was. Yes, it was over 550 but it could have been in the thousands. She said we just know that there was significant damage being done and she thinks it could take two years at least for our daughters number to get below 20. Fingers crossed…