Is Soy Gluten-Free? Yes, It Is!

Soy Sauce and Tofu

If you’ve ever wondered, “Is soy gluten-free?”—you’re not alone. Soy is a common ingredient in many everyday food products. It’s important to know if it’s safe for those with gluten intolerance or celiac disease.

The good news is that soybeans and soy protein are naturally gluten-free.

However, not all soy products are made equal, and some can contain gluten due to added ingredients or processing methods. In this guide, we’ll explain which soy-based products are gluten-free, and how to enjoy them safely if you’re avoiding gluten.

What is Gluten and Why Does it Matter?

Gluten is a protein found in wheat, barley, and rye. While it’s harmless for most people, those with gluten intolerance or celiac disease need to avoid it. Even small amounts of gluten can trigger uncomfortable symptoms like bloating or digestive issues. For people with celiac disease, consuming gluten can cause long-term damage to the intestines.

Is Soy Gluten-Free?

Yes, soy is naturally gluten-free. Both soybeans and soy protein, which comes from soybeans, do not contain gluten. However, not every product labeled “soy” is automatically gluten-free.

Pure soy and soy protein are safe for people with gluten sensitivities. However, processed soy products may contain gluten. This can happen because of added ingredients or cross-contamination. It’s important to check labels carefully to ensure that what you’re consuming is truly gluten-free.

Dipping sushi into soy sauce

Are Soy Products Gluten-Free?

Here’s a breakdown of some common soy products and their gluten content:

  • Is Soy Sauce Gluten-Free?: Traditional soy sauce is not gluten-free. However, there are gluten-free alternatives like tamari, which offers the same flavor without the wheat.

  • Is Soy Lecithin Gluten-Free?: Often used as a food additive, soy lecithin comes from soybean oil and is gluten-free. Find out more about what products you already buy that may contain soy lecithin!

  • Is Soy Oil Gluten-Free?: Made directly from soybeans, soybean oil is gluten-free and safe for those with gluten sensitivities. Learn how soy oil is a great oil alternative to vegetable oil.

  • Is Soy Milk Gluten-Free?: Some soy milk brands may contain gluten if they add wheat-based thickeners or flavorings. Be sure to check the labels for gluten-free certifications.

  • Is Soy Flour  Gluten-Free?: Made from roasted soybeans, soy flour is gluten-free. It can be a great substitute for wheat flour in gluten-free baking.

  • Is Soy Protein Gluten-Free? Yes, soy protein is naturally gluten-free and safe for people avoiding gluten.

By knowing which soy products are gluten-free, you can confidently include them in your diet. 

Get more insight from Consultation Dietitian Mollie Greenway about what soy protein is and how she recommends adding it to your diet.

Blending milk with a hand mixer

Why is Soy Sauce Not Gluten-Free?

Most traditional soy sauces contain gluten because they’re made with wheat. During the fermentation process, wheat is mixed with soybeans. This makes the final product unsafe for those who need to avoid gluten.

However, there are alternatives like tamari, which offers the same rich flavor without the wheat, making it a gluten-free option.

Even if soy sauce is not gluten-free, it’s a great way to add tons of flavor to dishes like our Teriyaki salmon rice bowl with edamame.

Is Soy Safe for People with Celiac Disease?

Yes, pure soy is safe for people with celiac disease. Soybeans and soy protein don’t have gluten, so they can be eaten without concern.

David Iverson, a local South Dakota farmer, makes high-protein soy pancakes with soy oil, soy protein, and soy flour. Try these gluten-free pancakes and let us know how they taste!

What About Cross-Contamination?

Cross-contamination happens when gluten gets into foods that are naturally gluten-free during processing. This can be an issue with some soy products, like soy flour or soy milk, if they’re made in facilities that handle wheat. To avoid this, look for products labeled “gluten-free,” especially if you have celiac disease or a gluten intolerance.

Adding fried to a fryer

Are Gluten and Soy Allergies The Same?

No, gluten and soy allergies are different. Gluten is a protein found in wheat, barley, and rye, while soy allergies involve a reaction to proteins found in soybeans.

Enjoy Soy With Confidence

Now that you know which soy products are gluten-free, you can confidently enjoy them in your gluten-free diet. If you’re curious about other soy-based foods or want to explore more gluten-free recipes, check out our blog on soy alternatives.

Try any of our soy-based recipes or learn more about how farmers practice sustainability and food safety everyday.

Share your favorite gluten-free soy products with us in the comments below or on Instagram by tagging #hungryfortruthsd!

Hungry For Truth

Hungry for Truth is an initiative about food and farming funded by the South Dakota soybean checkoff. The goal is to connect South Dakotans with the farmers who grow and raise their food. 

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