Why Some People React to Gluten-Free Oats

Have you ever added certified gluten-free oats back into your diet… only to feel bloated, foggy, or just off — and wondered, are oats actually safe? 

You’re not imagining it. 

Some people with celiac disease or gluten sensitivity truly do react to oats, even when they’re labeled gluten-free. Today we’re going to break down why that happens, what the research says, and how to decide whether oats belong in your gluten-free life.

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Transcript

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Welcome And Safety Disclaimer

SPEAKER_00 0:00

Quick reminder before we get started on this episode. This podcast is based on my personal experiences and isn't medical advice. Have you ever added gluten-free oats back into your diet only to feel bloated, foggy, or just off and wondered whether oats are actually safe? It's something pretty common for celiac and gluten sensitivity people to still feel bad with oats, even if they're labeled gluten-free and even if they're certified. Today we're breaking down why that happens and what the research says and how to decide whether oats belong in your gluten-free knife. Let's dive in.

Host Story And Show Purpose

SPEAKER_00 0:33

Welcome to the Gluten Free Engineer Podcast. I'm your host, Kiri Saunders. In 2011, I was diagnosed with celiac disease, a moment that changed everything. But I was determined not to let it hold me back. With my two engineering degrees, I set out to reverse engineer the gluten-free lifestyle, breaking down recipes, safety tips, travel hacks, and everything in between to rebuild a life I love. Whether you have celiac disease, gluten intolerance, or simply choose to live gluten-free, this podcast is for you. Join me each week as we simplify the gluten-free lifestyle, make it fun, and prove that you don't have to miss out on anything. Welcome back to

Do Oats Contain Gluten?

SPEAKER_00 1:11

the show. Today we're talking about oats and gluten-free oats and whether they're safe for them to spot celiac and those who have gluten intolerances. So, in general, oats do not contain gluten. It is not a grain that has gluten inside of it. They are called a protein called avion, not gladin, which are really kind of shorter words, but still harder for you to pronounce. And that's the gluten component in wheat. However, oats are frequently cross-contaminated with wheat during growing, harvesting, and processing, which is why if you're celiac, you really have to be eating certified gluten-free oats, ones that are grown not with wheat, ones that are not harvested with wheat and not processed with wheat, because a high possibility of cross-contamination occurs there. So regular oats

Cross-Contamination And Certification

SPEAKER_00 2:02

are almost always contaminated. And certified gluten-free oats are grown and processed under strict protocols, and they are definitely much, much safer for celiacs and for those who are gluten tolerant. But then even with certified oats, there have been studies showing a variability in contamination levels. Purity protocol oats are grown in dedicated fields. So those could be definitely safer. Mechanically sorted oats remove wheat kernels, but may not be perfect. You might remember when Cheerios first announced that they were gluten-free. What they were doing is they were doing a mechanical separation of the wheat from the oats. And that was actually still causing celiacs to have trouble. So they had to revise their processes. And from what I understand now, they're a lot more safe for celiacs, but double check the box as always for anything new you want to try to eat. So you do want to be aware that there's different ways these oats can come to our stores and how, you know, the level gluten-free there is there.

Purity Protocol Vs Mechanical Sorting

SPEAKER_00 3:06

And so sometimes your reaction to oats isn't about the oats themselves, it's about trees uh contact with wheat and trees contamination with wheat. And then here's where some things can get interesting. There is an avion sensitivity issue. Um, research shows a small percentage of people with celiac disease may have an immune response to avion. Most people, celiac do tolerate gluten-free oats, but some people may not. There is a minority that does not. So for most people, celiac oats are staged, but they're certified gluten-free, but a small subset, that oat protein may itself trigger an immune response similar to a gluten immune response. So we want to be listening to our bodies. It's kind of like, you know, one of our things on this podcast episode is listening to our bodies and discussing things with our doctors. Now, there's another reason that oats could bother us, even if

Avenin Sensitivity In A Subset

SPEAKER_00 4:03

we're not sensitive to the oat protein. And it could be the fiber or FODMAP. So this is huge and often overlooked. Oats contain a fermentable fiber. And fermentable fibers can cause digestive distress, especially in those people who have had their digestive systems damaged. And it's a highly soluble fiber load onto your body, and that can cause bloating, it can cause gas, it can cause abdominal discomfort. So even if there's no immune reaction, it may not be something that is suitable for your body. So digestive symptoms do not automatically mean immune damage. It could just mean you're just not tolerant to that food as well. So I want you to, you

Fiber, FODMAPs, And Digestive Load

SPEAKER_00 4:48

know, listen to your body, even if you're eating certified gluten-free oats, it could be just something about the oats your body just doesn't like. For me personally, once I cut out oats, um, they actually are high in lectin too. And so once I cut out oats, because I started cutting out some of the higher lectin foods, my allergies started going away. Oats didn't really give me much digestive distress, but it was bothering me in other ways. So again, we got to be listening to our body. Now, one thing I do want you to caution about if if you are early in your healing journey, if you have C Lac disease or if you've been, you know, highly gluten intolerant, you may not want to be eating oats yet. You're going to have probably inflamed intestines, and that's going to just irritate them because think about oats. They're very, I guess you could just call them scratchy. And, you know, we also know that they have a lot of fiber in them. And adding too much fiber and, you know, kind of roughage, I guess you would say, too early can overwhelm a healing digestive system. So clinicians, some clinicians recommend waiting several months before reintroducing oats. This gives you just a great guideline to just listen again to your body and to, you know,

Early Healing: Delay Reintroducing Oats

SPEAKER_00 6:02

hold off on things like oats or things that are a lot more fibrous in case they're going to bother you. So then let's get down to the question. Should you be eating oats? If you tolerate certified gluten-free oats and your labs are stable, they may be fine for you. And that's good, and that's good for you. But if you feel consistently unwell after eating them, please listen to that. Listen to your body, keep a food log. Anytime that you're going through a stage where you don't feel right and you don't feel good, start taking a food log for a week or two and see if you can notice the pattern. And then I want you to work with your doctor if you have

Should You Eat Oats? Decision Guide

SPEAKER_00 6:40

confirmed celiac, whether it's a good idea for you to even eat them. And oats are optional to have in our diet and they're not required. It's something that we don't technically need as humans to, you know, thrive and survive in this world. So if you do need to cut them out, you know, work through that and see how you can substitute. What could you eat instead if you love to eat oats? What can, you know, bring that satisfaction? Or maybe you can tolerate it once a month or once every couple weeks. If you know your numbers and your labs are good if you're celiac, you know, maybe you just do it that way. Like for me, for example, I can't eat too much corn. That causes me digestive distress, especially the grain form. So I know maybe once a month I might eat some corn chips if I go to Mexican, but I know I just don't eat very much of them because they cause me digestive distress if I have a lot of it. It just causes a lot of pain in my system. So I listen to my body, sometimes treat myself because it's not harmful to me from a celery perspective. It just causes discomfort. So I listen to that and just, you know, treat myself, like I said, every once in a while. So listen to your gut, literally and figuratively. Work with your doctor and see whether you can have oats added back into your life. Again, if you're new,

Practical Reintroduction And Closing CTA

SPEAKER_00 8:03

give it a few months to six months to a year. If you're newly diagnosed celiac, it's just really a good idea to uh cut things like that out, later known to cause most people digestive distress or a little bit more fiber overload in their system. And then you can look at introducing them later if your doctor uh thinks that it's safe. So if you're still unsure about oats, try introducing them in a small amount from a trusted certified source and pay attention to your patterns, not just one single moment. Pay attention to those patterns. Curiosity beats panic every time. Thank you for listening to this episode of the Gluten Free Engineer. If you found value in this story, please share it with someone who might need encouragement on their own gluten-free journey. For more tips, recipes, resources, and even links to my YouTube channel, head on over to theglutenfreengineer.com. It's your one-stop hub to make gluten-free living simple, fun, and full of flavor. And don't forget to subscribe so you never miss out on an episode. And we will see you next week. The Gluten Free Engineer Podcast is for informational and entertainment purposes only. I share my personal experiences and stories about living with celiac disease and navigating a gluten free lifestyle. This podcast does not provide medical advice. Always consult with a qualified healthcare professional for medical questions, concerns, or advice specific to your health.