I was coming off of Medifast (a low carb, low calorie diet, low gluten) and knew that I felt better than ever. I have always suffered from gastro issues but no doctor ever suggested it might be gluten. I also have an autoimmune disease (caused my hypothyroidism and premature ovarian failure) but again no doctor ever suggested it might be gluten. So, after I was done with Medifast I knew I couldn't go back to eating SAD so I started doing a ton of reading. I think it was a link on a Jimmy Moore or Atkins forum that got me here.