Are Oats Gluten-Free? Your Complete Guide to Enjoying Oats Safely

Are oats gluten-free? If you have celiac disease or gluten intolerance, this is likely a pressing question for you. You might have seen conflicting information, and it can be confusing. This complete guide aims to clarify the complexities and help you make informed choices.

So, are oats gluten-free? The answer is both yes and no.

Have you seen the acronym BROW?  It stands for barley, rye, oats, and wheat, the grains you need to avoid if you are gluten-free.  But it’s a little more complicated than that.  Pure oats are naturally gluten-free, but the major concern with oats is cross-contamination. For this reason, it's important to only buy oats or oat products that are certified gluten-free.

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When Are Oats Not Gluten-Free?

Oats are not gluten-free if they are contaminated with wheat, rye or barley. Those are the grains that contain gluten.  This can happen during growing, harvesting, transportation, and processing.

Since even a tiny amount of gluten can be harmful to someone with celiac disease, it is important to choose certified gluten-free oats.

What Makes Oats Gluten-Free?

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The next part gets a little technical and you may be wondering why you need to know this. 

The truth is, you don't really need to know. If you're satisfied to simply look for the gluten-free symbol on the label, that's fine. But if you're confused by items that are labeled gluten-free one day and not the next, or by items that carry the gluten-free label in one country but not in another, you may find this helpful. 

There are two methods to ensure oats are free from gluten: mechanical sorting or purity protocol.

Mechanical Sorting

Mechanical sorting uses machinery to remove gluten-containing grains from oats. The problem is, even a few stray wheat grains increase gluten content in specific servings, potentially exceeding the 20ppm safety threshold for people with celiac disease.

However, with rigorous testing, safe gluten-free oats can be produced through this method. Let's explore two cases:

Quaker and General Mills both use mechanically sorted oats, but have different testing protocols.

Cheerios and Gluten-Free Claims

Cheerios, made by General Mills, uses mechanical sorting. Independent tests have detected unacceptable gluten levels in Cheerios, leading to a ban on gluten-free labeling in Canada (though it remains in the U.S.). Cheerios are not considered safe for people with celiac disease.

Quaker Oats Products

Quaker Oats gluten-free products are considered safe for people with celiac. They also use mechanical sorting but follow stricter testing protocols than General Mills. For this reason, Gluten-Free Watchdog endorses Quaker’s gluten-free products but not Cheerios.

Purity Protocol Oats

Purity protocol oats are grown and processed in dedicated gluten-free environments, significantly reducing cross-contamination risks. This makes them the safer option for those with celiac disease.¹ 

Brands That Use Purity Protocol Oats

Only Oats

Aveena Foods

Gluten-Free Prairie

Bay State Milling

GF Jules 

Bakery on Main

GF Harvest (GFWD does not recommend)

Brands That Use Mechanically Separated Oats

Quaker (GFWD supports Quaker) 

General Mills (Cheerios, Lucky Charms) 

Trader Joe’s

Bob’s Red Mill – Uses both purity protocol and “sorted” oats

Nature’s Path

Should You Only Eat Purity Protocol Oats?

As always, I’m not here to tell you what to do.  I provide the facts so you can make informed decisions.  Mechanically sorted oats pose a higher risk than purity protocol oats although neither is entirely risk free.

 Is Oat Milk Gluten-Free

As with everything else, check labels and only buy oat milk (or oat beverage) that is certified gluten-free. 

Earth’s Own oat milk was gluten-free until they started using standard oats in 2022 and removed the gluten-free claim from their packaging.  I've noticed the gluten-free label has returned so I've reached out to the company for clarification.  I'll update here if and when I get an answer.

If you are looking for a certified gluten-free oat beverage you may wish to try Silk or Natura brands of gluten-free oat milk.

 What If You React to Gluten-Free Oats?

A small percentage of people with celiac disease cannot tolerate oats, even if they are certified gluten-free.  It seems that the culprit may be the protein “avenin” which is present in oats.²

There was good news however in a 2023 study involving people who have immune reactions to oats. There is no intestinal damage like there would be if they were consuming gluten.

When To Introduce Oats Into Your Gluten-Free Diet

 Dr Alessio Fasano is Director of the Center for Celiac Research and Treatment at Massachusetts General Hospital and author of the book Gluten Freedom. He recommends waiting to introduce oats until all symptoms have resolved and testing is back to normal.³ 

Celiac Canada agrees, suggesting that it could take 6 to 18 months before an individual is ready to introduce oats to the diet.⁴

Ways that Gluten-Free Oats Are a Beneficial Addition to Your Diet

• Oats are packed with nutrients and are an easy way to add some high-octane nutrition to your diet.  As my grandmother used to say, they “stick to your ribs”. 
• Oats are an excellent source of dietary fiber, particularly beta-glucan, which can help manage cholesterol levels and support heart health.
• Oats offer a good amount of protein compared to other grains.
• Oats are rich in vitamins and minerals such as manganese, phosphorus, magnesium, and iron.

Just remember to look for certified gluten-free oats.

The Gluten-Free Oat Shortage

During the pandemic, there was been a shortage of gluten-free oats.  Various factors contributed to the shortage including increased demand and supply chain disruptions. This created challenges for consumers and producers of gluten-free oat products.  Some products like Earth’s Own Oat Beverage began using standard oats and removed their gluten-free labelling.

Despite the shortage, many brands continued to supply gluten-free oat products, although you might have had to hunt a bit harder or pay a bit more.  As time passed gluten-free oat products began to repopulate the shelves and things are getting back to normal.

How to Incorporate Gluten-Free Oats into Your Diet

Now that we know the answer to the question "are oats gluten-free?", let’s talk about how to incorporate oats into your healthy gluten-free diet.

• Gluten-Free Oatmeal: Starting the day with gluten free oatmeal is a warm, nutritious option. You can dress it up with fruits, nuts, seeds, and a drizzle of honey or maple syrup.
• Overnight oats are another delicious, convenient choice. Mix gluten-free oats with your favorite milk or yogurt, add some seeds or fruit, and let it sit in the refrigerator overnight. You’ll wake up to a ready-made, wholesome breakfast.
• Oat flour, which is made from ground gluten-free oats, can be a versatile ingredient in your kitchen. Use it for baking gluten-free bread, muffins, pancakes, or cookies.  You can make your own oat flour by whizzing up some gluten-free rolled oats in the food processor. 
• Homemade granola is a fantastic option. Combine gluten-free oats with nuts, seeds, dried fruit, and a touch of sweetener, then bake until golden and crispy. 
• Gluten-Free Oat milk is an excellent dairy-free alternative. Enjoy it in your coffee, cereal, or smoothies.
• Breadcrumb Alternative: Consider using gluten-free oats as a binder in meatloaf or burgers. It helps to hold everything together while adding extra fiber and nutrients.
• Do you like granola bars or protein bars made with oats? Many brands offer gluten-free options — just be sure to check the label.  Or try my convenient and tasty homemade gluten-free granola bars made with gluten-free oatmeal.
• If you’re adventurous in the kitchen, you can even try making your own gluten-free snacks with oats. Think oat crackers, oatmeal cookies, muffins or gluten-free oat tortillas. They’re fun to create and customizable to your taste.

I'll bet you didn't realize there were so many ways to get gluten-free oats into your diet! Once you identify safe products, it becomes much easier.

So, Are Oats Gluten-Free?

 The next time you find yourself asking, “Are oats gluten-free?” you’ll have all the information you need. To recap, here are the key points to help you enjoy the benefits of gluten-free oats and incorporate them into your diet safely and deliciously!

• Look for oats and oat products that are certified gluten-free.
• Learn about purity protocol and mechanically sorted oats so you can make informed decisions.
• Wait for 6 to 18 months after your celiac diagnosis to introduce gluten-free oats into your diet.
• Avoid Cheerios and Lucky Charms even though they carry a gluten-free label in the U.S.
• Look for simple and delicious ways to add gluten-free oats and the nutrients they bring to your diet.

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Patty Maguire is a George Brown College culinary graduate whose training focused on nutrition and cooking for special diets.

Since her celiac diagnosis in 2012, she has shared a practical, whole-food approach to naturally gluten-free living that helps readers cook with confidence, eat out safely, travel well, and live fully.

Rooted in farm-family values and simple home cooking, her work has been recognised by Feedspot’s top 10 Canadian gluten-free blogs list.

Sources:

4. Association, C. C. (2024b, April 15). Oats. Celiac Canada. https://www.celiac.ca/living-gluten-free/oats-statement/