I've been gluten free for almost 3 months, but I'm still feeling pretty lousy. Just found out my vitamin D is quite low (level was 15; "normal" range starts at 30). I'm hoping that explains some of the lethargy etc. My most troublesome symptom continues to be my shortness of breath/inability to catch a breath/air hunger. I haven't been tested for any other vitamins/minerals & related deficiencies, but as Vitamin D is typically not correlated with SOB, I'm curious about other's experiences with deficiencies and wondering which are most common to Celiac.