DAO Enzyme (formerly Histamine Digest / Histamine Block) by Seeking Health: A capsule of diamine oxidase (DAO), an enzyme that helps break down histamine…
A capsule of diamine oxidase (DAO), an enzyme that helps break down histamine from food. It is for people who react to high-histamine foods and drinks. The DAO comes from pork kidney, so it is not vegetarian or vegan.
Per Seeking Health's product page:
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