Allergies:

• I personally haven't heard of any contact allergies from cats using our litter or other soy litter. I would assume consumption of soy in the form of food/treats is a much different allergen risk and if any symptoms present for your kitty we recommend to discontinue the Really Great Cat Litter and reach out to your local veterinarian just incase.
• Our litter does not contain tree nuts or sesame but unfortunately, we cannot guarantee 100% that there isn't any trace contamination as the manufacturing facility is not certified nut-free/sesame-free. We also can't guarantee that the sub-suppliers from whom we purchase raw ingredients do not handle any allergens in their facility/warehouse.