DAO, or diamine oxidase, is an enzyme that breaks down histamine ... non-GMO ingredients and is vegan-friendly. We also like that it comes in a small, 60-capsule bottle that’s easy to take ...

Diamine oxidase (DAO) is an important digestive enzyme in your body. Some people take diamine oxidase supplements to help with histamine intolerance, which can cause migraines and headaches ...

Diamine oxidase is an enzyme that helps break down excess histamine in your body. More research is needed to establish effectiveness and dosage, though current studies report no adverse effects.

Diamine oxidase deficiency may cause histamine intolerance. Other than enzyme deficiencies, transporter molecule defects may be present. These include defects in GLUT 5, which transports fructose ...