Those who need to follow a dairy free diet, by need or choice, do not need to forget about ice cream. Replacing milk with soy is an option. The recipe is also free from egg and uses fructose to help those who cannot tolerate sugar. There is also a carob based version for those who need to avoid chocolate.
A gluten free diet is essential for celiac disease and for wheat allergy, and of no proven benefit otherwise. What to avoid, which grains are safe, and how to bake without gluten.