Depending on what you want to know, there are several tests available. If you want to know if you have Celiac Disease, blood tests and biopsies are what is required. Just click on Tests for Celiac Disease (below) to get the full scoop.
If you want to know if your food has gluten in it or how the powers-that-be test for gluten content, there are tests for that, too. Just click on Gluten Testing for Food (below) to get the skinny on that one.