HistoDAO is a patented enzyme formula containing diamine oxidase (DAO)  the main enzyme responsible for the degradation of ingested histamine. This enzyme has been clinically tested and found to break down food-derived histamine in the digestive tract. DAO is not absorbed and does not have systemic activity. HistDAO does not manage or address antibody-related or IgE-related food allergies.

• Supports Healthy Degradation of Food-Derived Histamine
• Enhances the Presence of Diamine Oxidase in the Digestive Tract

DOES NOT CONTAIN: Wheat, gluten, yeast, soy, dairy products, shellfish, peanuts, tree nuts, egg, artificial colors, artificial sweeteners, or artificial preservatives.