With so many health trends out there, it may be easy to jump on the gluten-free bandwagon. But what if one of the most popular dietary topics truly applies to you? According to the National Foundation for Celiac Awareness, nearly 18 million people suffer from gluten intolerance. About 3 million of these individuals have celiac disease, and millions more have varying levels of gluten intolerance ranging from mild to severe. Out of 18 million with gluten intolerance, more than 80 percent aren’t even aware that they have it.

But before delving into exactly who suffers from gluten intolerance, let’s first define it.