HistaGest-DAO™ is a specialized enzyme formulation providing supplemental diamine oxidase (DAO), the primary enzyme responsible for the metabolic breakdown of food-derived histamine. Each gastro-resistant tablet delivers 20,000 histamine-degrading units (HDU) derived from highly purified porcine kidney extract. The formulation is designed to support healthy histamine metabolism and physiological resilience when consuming histamine-rich foods.