Diamine Oxidase Activity

Diamine Oxidase Activity


The Diamine Oxidase (DAO) Activity test measures the activity level of the DAO enzyme in your blood. DAO is responsible for breaking down histamine, and reduced activity may lead to histamine buildup in the body. This can cause symptoms such as bloating, headaches, flushing, or allergy-like reactions. This test helps support the diagnosis and management of histamine intolerance and related conditions.

Parameters Covered

Diamine Oxidase Activity

What the Test Measures

This test measures the activity of the Diamine Oxidase enzyme in your blood, which is essential for breaking down histamine. It helps determine whether low DAO activity could be contributing to histamine intolerance and related symptoms.

Turnaround Time for Results


Leicester: Most results are available within 1–2 working days (some tests may take longer)
Outside Leicester: Results are typically available within 2–4 working days (some tests may take longer)
Certain parameters: Some specialised tests may take 2–3 weeks to process.

How Results Are Delivered

Your personalised report will be securely sent to your registered email address.