Intestinal Permeability Urine Test Kit

At-home urine test measuring how two sugar molecules of different sizes pass through the intestinal wall.

What this test measures

The recovery in urine of two ingested sugar molecules — lactulose and mannitol — and the ratio between them.

Why these markers matter

The two sugars are different sizes. The smaller one passes through the intestinal wall readily; the larger one much less so. Measuring how much of each appears in urine after drinking a standard solution describes how the barrier is behaving. The ratio matters more than either figure alone, because it corrects for how much you absorbed overall.

What you get

Kit posted to you with the test solution, collection containers and instructions. Results in your private dashboard, typically one to two weeks after collection.

Before you collect

This is a challenge test: you fast, drink the supplied solution, then collect urine over a set period. Set aside the morning. Follow the fasting and timing instructions exactly — the ratio is meaningless if the timing slips.

Who this suits

People working with a practitioner on gut barrier questions.

Your next step

Once you have your results, book with a Canwell naturopath, nutritionist or practitioner to talk them through and build a wellness plan that suits you. Book with Canwell