DAO enzyme, also known as diamine oxidase, is used to help break down dietary histamine in the digestive tract. It may support people who experience discomfort after eating high-histamine foods.

Histamine is a natural compound found in the body and in certain foods. It plays roles in immune response, digestion and nervous system signalling, but some people may be more sensitive to histamine from food.

DAO enzyme helps break down histamine from foods before it is absorbed. This may support digestive comfort and help reduce reactions linked to high-histamine meals.

High-histamine foods commonly include aged cheese, fermented foods, wine, cured meats, leftovers, vinegar-containing foods and some smoked or preserved foods. Individual tolerance varies, so food response can differ from person to person.

DAO enzyme is usually taken shortly before eating high-histamine foods. It works in the digestive tract, so timing it close to the meal is important. Always follow the directions on the product label.

DAO enzyme may support people who experience occasional bloating, flushing, headaches or digestive discomfort after high-histamine foods. Persistent, severe or unexplained symptoms should be assessed by a qualified healthcare professional.

No. DAO enzyme is not the same as an antihistamine medication. It works in the digestive tract to help break down dietary histamine, while antihistamines act on histamine receptors in the body.

DAO enzyme may support the breakdown of dietary histamine, but it is not intended to diagnose, treat, cure or prevent histamine intolerance or chronic histamine-related conditions. Ongoing symptoms should be discussed with a healthcare professional.

DAO enzyme is usually used as needed before high-histamine meals rather than as a general daily supplement. Long-term or frequent use should be discussed with a healthcare professional, especially if symptoms are ongoing.

Speak with a healthcare professional before using DAO enzyme if you are pregnant, breastfeeding, taking medication, managing allergies, digestive conditions, mast cell disorders, chronic histamine symptoms, or shopping for a child.