<<Disclaimer: Verify this information before applying it to your situation.>> Bill Elkus shared his gluten testing results and solicited comments from others. Here are mine. I used the same kit Bill used but with very disturbing results! In all fairness, my results may have been caused because I did not PROPERLY follow the test kit instructions. Item 1. I tested a can of soup whose ingredients indicated it was GF. The results were totally clear indicating no gluten. Item 2. I tested the wheat starch in the kit and got a very pale blue indication that agreed with the test color standard in the kit. Item 3. I tested some EnerG rice flour. I got a pale blue much darker than the wheat starch standard indicating the presence of gluten. Item 4. I tested some apple cider vinegar. I got a vivid blue indicating the presence of gluten. Item 5. I went outside and picked a fresh lemon from a tree and tested the juice. I got a vivid blue indicating the presence of gluten (which is total nonsence!). Item 6. I tested a piece of grocery store balloon bread and got a vivid blue indicating the presence of gluten. I contacted the kit manufacturer in Australia and was told (after almost a year of non-response) that the very acetic nature of vinegar and lemon juice was the culprit; the monoclonal antibodies got confused and would not react properly. Medical Innovations Ltd. sent me a new test kit and suggested I not test highly acetic foods. By this time, my faith in the basic process of monoclonal antibodies for gluten testing was destroyed. I had gotten positive tests where gluten was not present, positive tests where gluten was present, and negative tests where gluten PROBABLY was not present. I never got a negative result where gluten was known to be present. Shortly after receiving the replacement test kit, Mary Alice was diagnosed with lung cancer and our world became totally topsy-turvy. As many of you know, she died from the lung cancer last January so I donated the remainder of the kit to GIGofFlorida. Mike Jones may have more info to add. Joe S. Warren Titusville, FL 32796-3902