Jarrow Formulas AllerTame combines plant extracts and contains natural ingredients which support a healthy immune response. It maintains a healthy inflammatory response; especially in seasons when the body is more sensitive to environmental factors. Moreover, it supports a healthy response to airborne allergens. Contains petasin which is a butterbur extract prepared by patented extraction process that removes all potentially toxic alkaloids. Also contains quercetin and omega-3 fatty acids from perilla oil that helps promote a healthy inflammatory response to enviornmental challenges.