May help support digestion of food-derived histamine in the digestive tract Enhances the presence of diamine oxidase enzyme in the digestive tract Patented material with optimized stability It May help support normal inflammatory responses in the digestive tract Seeking Health Histamine Block contains a patented enzyme formula providing 10000 HDU of diamine oxidase DAO - the main enzyme responsible for the degradation of ingested histamine - per capsule. Histamine is known as a biogenic amine an organic nitrogen compound involved in certain immune responses and found in mast cells. It may be involved in regulating healthy function in the GI tract as well as the nervous system. Histamine also plays an important role in triggering the body s normal inflammatory response. Suggested Use Take 1 capsule no more than 15 minutes before the consumption of histamine-rich foods or take as directed by your healthcare professional. Warnings Children and pregnant or lactating women should consult their healthcare practitioner prior to use. This product contains an ingredient derived from porcine pig. Avoid if allergic to pork or any other ingredient. Histamine Block is NOT EFFECTIVE for symptoms of immune-related food allergies such as peanuts shellfish etc. or for gluten intolerance due to sensitivity or celiac disease. DAO is not absorbed and does not have systemic activity. Histamine Block does not manage or address antibody-related or IgE-related food allergies.