DAO Enzyme Activity Test

The DAO enzyme activity test (DAO Test) is a diagnostic test to measure the activity of DAO (Diaminooxidase) enzyme in blood.

Certain migraine sufferers may find out if the source of their condition is in a disorder of metabolism of Histamine present in certain foods rich in this substance. The Test measures the activity of the DAO enzyme and is very useful in the prevention of migraine attacks.

There is a great variety of symptoms derived from the DAO enzyme deficiency. Patients do not necessarily have all the symptoms described, but most of them are known to present on average three of these symptoms, with migraine being especially prevalent among them.

More Common Symptoms Caused by DAO Deficit

  • Migraine and other vascular headaches
  • Gastrointestinal disorders, especially those associated with Irritable Bowel Syndrome (IBS), such as constipation, diarrhea, flatulence, or bloating
  • Dermatological disorders such as dry skin, atopy or psoriasis
  • Soft tissue pains often diagnosed as fibromyalgia
  • Chronic Fatigue
  • In childhood and adolescence the deficit of DAO has been related to attention deficit hyperactivity disorder (ADHD)