How will i know if i need to be tested for celiac or gluten intolerance?

Weight loss: If you are experiencing unexplained weight loss, gastrointestinal symptoms especially after having eaten gluten (usually in wheat), and even nerve problems (numbness, you should considered being tested for gluten intolerance. A simple blood test may provide the diagnosis (although not as definitive as an intestinal biospy) but you must be eating gluten for the test to be accurate.