<<Disclaimer: Verify this information before applying it to your situation.>> The following information is to be used only for the reasons I have described below. There is a company in the United States which does do gluten content testing in parts per million. They will only do this for manufacturers, not for individuals. The process is long, it is expensive. . . extremely expense. It takes from 6 - 9 months to complete this process because of how long it takes to get the test kits from Australia. If you call a company which is willing to have their products tested for gluten content, you may provide them with the following information, business name, the contact, phone number, and address. Under no circumstances should people from the list call this firm and ask if a product has already been tested by them. They will not provide you with any information. They will only work directly with a manufacturer and provide the manufacturer with their findings after the testing is done. It would be a nightmare to have 2300 calling on ten products each, wondering if they have ever been tested. Very few products have been tested by them, because the test is not well known of. Few businesses know that such a test is available. But, for the record, the company which will do gluten content tests ONLY ONLY ONLY for manufacturers is as follows: Covance Laboratory 900 Leesburg Pike Vienna VA 22182-1699 Contact is: Michael Hirsh Phone Number is: 703-759-7880 ext 5478 This is the company I will recommend to the busines which manufacturers Barleygreen. It may take 6 - 9 months for the results. Abigail