• 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
• May help support normal inflammatory responses in the digestive tract

Histamine Block is now packaged in a moisture-controlled, desiccated bottle for enhanced product stability and potency. This new packaging delivers unparalleled protection for products that are sensitive to outside moisture. A desiccant sleeve surrounds the product creating an impenetrable barrier, contributing to greater product stability over time. Research has shown this container system to be more effective than standard bottles containing desiccants or even blister packs.
Take 1 capsule no more than 15 minutes before the consumption of histamine-rich foods, or take as directed by your healthcare professional.

Serving Size: 1 Capsule

Amount Per Serving
Vitamin C … 10mg
(as ascorbic acid)
DAO2™ porcine kidney extract … 4.2mg
(Diamine Oxidase Activity 10,000 HDU)

Other Ingredients: Microcrystalline cellulose, vegetarian capsule (hypromellose, water, and gellan gum), and ascorbyl palmitate

NOT Suitable for Vegans and Vegetarians

Contains: Porcine

Free of: Milk, Egg, Fish, Tree Nuts, Peanuts, Wheat, Soy, Gluten, Artificial Colors
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.