Millet in Ingredients & Food Labeling Issues Posted November 8, 2011 · Report to Admin Just curious what kind of reactions you all have had. I found a millet bread I have been eating since it is gluten free. But for the past 3 weeks I have had severe headaches. I didn't know if there could be a correlation. I've also had some stomach cramping at night. Is there a test to confirm a millet allergy or is it a matter of eliminating it from my diet to know for sure.