How to Diagnose Leaky Gut

Can doctors test for leaky gut?

Lactulose/mannitol test is the most common and only direct test of a leaky gut.

Does leaky gut show up in blood work?

Leaky Gut Assessment (Intestinal Barrier Function)

Blood or stool tests for zonulin can indicate the presence of leaky gut. Blood tests can also show potential causes of leaky gut: high histamine, low DAO, antibodies to intestinal cells, and immune activation to bacteria.

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