It has sadly come to my attention that Dr. Bronner's has added corn to much of their product line:
"Are your products free of gluten, corn, soy and nuts? Why am I having an allergic reaction?
In general, Dr. Bronner’s products are gluten-free, and they do not contain any common allergens such as soy or nuts. However, there are a few exceptions: our Shaving Gels, Lotions and Hair Crèmes contain xanthan gum derived from non-GMO corn, and our Castile Liquid Soaps, Castile Bar Soaps, Pump Soaps, and Shaving Gels contain citric acid derived from non-GMO corn.."
