Not a stool test, but a GI blood test for elevated intestinal permeability, also known as leaky gut*

Available in Ontario Only. Walk-in blood collection at In-Common Laboratories headquarters in North York, or have a kit mailed to you for blood collection at any Alpha Labs location.

Refrain from taking non-essential medications and dietary supplements (especially biotin) for 72 hours before the specimen collection.

See test details here: https://www.doctorsdata.com/Zonulin-Family-Protein-serum

*The zonulin stool test is not orderable by Ontario naturopathic doctors