Celiac as a disability?

I came across article about celiac/gluten intolerance as a disability. (Here is link to the blog post: http://www.celiact.com/blog/2013/04/16/178-gluten-free-disability).
And I wonder myself if it should be classified as such.
Celiac has enormous impact on peoples lives. Not only personal but also profesional. It affects the ability to work, because often people with this disease feel tired/weak all the time.…