Is ProLon® gluten-free? 20 February 2023 17:08 Updated ProLon is gluen-free. Related articles Can I participate in this program if I have a precedent of allergies, or maybe gluten or lactose intolerance? How many cycles of ProLon® can be recommended to an individual in a one-year period? What if I have an allergy to nuts? Can I extend the fast? Does ProLon ReSet contain gluten?