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, gut ...

Diamine oxidase (DAO) is an enzyme and supplement often used to treat symptoms of histamine intolerance. This article reviews DAO supplements, including their benefits, dosage, and safety.

VIENNA, Austria — Preventive treatment with diamine oxidase (DAO), an enzyme that degrades histamine, significantly shortened the duration of migraine attacks and trended toward reducing the ...