![HISTAMINE SUPPORT.](http://vfpplus.com/cdn/shop/products/box-image_2edfcd4c-4440-4e5b-9b94-59c7b5b299b3_{width}x.gif?v=1687293713)
HistDAO™ 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.*