This product is available exclusively from Inner Strength's Practitioner range, by either:
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.