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Flower Celiac Patient Education Information:
How Do You Tell If It Is Gluten-Free?
Image By Lani K. Thompson, copyright 2005
(Editor's Note: Lani and Jeffrey Thompson publish the Clan Thompson Celiac website, and the Celiac SmartLists, a computer database application that tells what's gluten-free and what's not safe. Download a FREE SmartList demo).


Researching gluten-free products
People often ask me how I research the products we list in our food and drug pocketguides and in our SmartLists. It's not an easy question to answer! Researching products is a painstaking process. When I call a company, the conversation I have depends a lot on the person I'm talking with.
Knowledgeable representatives
Sometimes company representatives are very knowledgeable about celiac disease. Not only do they offer to send me a list of gluten free products, they volunteer additional information such as the fact that any starches they use are derived from corn or potato or that they manufacture drugs on a dedicated line.
Unknowledgeable representatives
Other times a company representative will announce that a product must be gluten free because "there's no gluten listed on the label" or because "it's Kosher". These kinds of comments alert me to the fact that the person I'm talking to doesn't really understand what "gluten free" means. I need to explain that we need to avoid wheat, rye, oats, barley, and spelt as well as any ingredients derived from them such as starch or certain flavorings.
What to do?
However, while the conversation I have has to be tailored to each company, there are some basic things that I always try to do.
  1. I always start out by asking if the company has a list of gluten free products they can send me. Asking for a list tells me two things:

    • first, that a company is somewhat familiar with celiac disease
    • second, they're willing to put information in writing.

    Also, companies that can't provide a written list and only read a list of products over the phone are more apt to give you inaccurate information. I think one of the reasons for this may be because those kinds of lists are often assembled "on the spot" by the person who is quickly reading through information on different computer screens.

  2. Once I see a written list, I may call a company back and ask specific questions about certain items, especially if something doesn't look "right." Cookies and cream flavoring necessitated one callback, but the manufacturer assured me there were no actual cookies in the flavoring. Another time, I found minestrone soup on a gluten free list. When I called back, the manufacturer agreed that it was not gluten free.

  3. If a manufacturer doesn't have a written list, I ask him to check products over the phone. If I'm aware of specific ingredients, such as modified starch, I'll ask what it's derived from.

  4. I also ask about possible cross contamination. Unless a product is made in a dedicated factory -- and most major brands are not -- it will probably be manufactured on the same lines as those that produce gluten-containing products. However, most manufacturers will state that the lines are thoroughly cleaned between runs. For many celiacs, this is enough and they're willing to use these products. Some celiacs, however, don't consider these items to be "gluten free."
How do we define "gluten free"?
Clan Thompson does not define gluten free. Since there is no way for us to test products ourselves, our aim is to let people know what manufacturers say about their own products.
  • Sometimes products do not contain any gluten-containing ingredients and are manufactured in gluten-free environments.

  • Sometimes products do not contain any gluten-containing ingredients, but are manufactured on lines with other products that do contain gluten.
In either case, if the item is listed on a company list of gluten-free products, it will be listed as "Gluten Free: Yes" in our SmartList. We have an additional field in the SmartList for comments and we include extra information from the manufacturer when we have it.

Sample comments might include:

  • "Manufacturer states that the product contains no gluten containing ingredients but cross contamination is possible."
  • "Manufactured on lines producing gluten containing products, but lines are thoroughly cleaned between runs."
  • "Manufacturer states there is no possibility of cross contamination."
Sometimes a manufacturer will tell me there are no gluten containing ingredients and the lines are cleaned, but they can't guarantee that a product is gluten free. In those cases, we list the item as "Gluten Free: Unknown" with an appropriate comment in the comment field.

My feeling is that if the manufacturer refuses to say that a product is gluten free, even if there are no gluten containing ingredients and the lines are cleaned, then it's not my job to make that decision for him. My job is to report what he says so that our customers can make their own informed decisions.

I think it's very important to verify information directly with each manufacturer. We never depend on "word of mouth" assurances from friends, other celiacs or message boards. Friends and other celiacs don't manufacture foods and drugs, so how can they know what's in them? Only manufacturers know what's in the products they make, but friends and message boards can serve an important function.

For instance, they can alert you as to when a product may have changed. If you suddenly hear that Brand X Allergy tablets lists wheat starch on its label now, and it used to list cornstarch, you'll know it's time to call the manufacturer and update your information. Even then you need to carefully check the label. Are you looking at the 4-hour tab or the 8-hour tab? Just because they're both Brand X Allergy tablets doesn't mean the information is the same for both of them.

Trying to figure out whether a product is gluten free or not can be difficult, especially for newly diagnosed celiacs. Some ingredient names don't even sound like part of the English language! Our goal is to provide news and information for the celiac community. Aside from our products, we have a lot of free information on our website including over a hundred celiac medical questions which have been answered by some of the top celiac specialists in the US.

We also post articles and research stories from our free celiac newsletter, answer questions about gluten free cooking, post recipes and traveling info and host a discussion site. We maintain gluten information for an online list of ingredients on our Resources/Free Info Lists page...or you can write to us at celiac@clanthompson.com if you'd like help researching your favorite foods or drugs.

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