Is Soy Sauce Gluten-Free?
Quick Answer
No, traditional soy sauce contains wheat and is NOT gluten-free. Use tamari or coconut aminos instead.
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The Full Answer
Regular soy sauce is made from a fermented paste of soybeans, wheat, salt, and water. Wheat is a primary ingredient — typically 40-60% of the grain content — making it unsafe for people with celiac disease.
This is one of the most common sources of hidden gluten exposure, especially at Asian restaurants, in marinades, teriyaki sauce, and many processed foods. Even "low sodium" soy sauce still contains wheat.
The safe alternative is tamari, which is a Japanese soy sauce traditionally made without wheat (though some brands add it, so always check). San-J Tamari and Kikkoman GF Soy Sauce are reliably gluten-free. Coconut aminos are another excellent wheat-free alternative with a slightly sweeter, milder flavor.
Hidden Gluten Risks in Soy Sauce
- ⚠Present in most Asian restaurant cooking
- ⚠Hidden in teriyaki, ponzu, hoisin sauce
- ⚠Used in marinades, dressings, and gravies
- ⚠May be listed as "soy protein" or "hydrolyzed soy" on labels
Safe Brands
- ✅ San-J Tamari (GF)
- ✅ Kikkoman GF Soy Sauce
- ✅ Coconut Secret Coconut Aminos
- ✅ Bragg Liquid Aminos
Avoid These
- 🚫 Kikkoman Regular
- 🚫 La Choy
- 🚫 Most restaurant soy sauce
- 🚫 Any soy sauce without GF label
Gluten-Free Alternatives
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About the Author
Sarah Mitchell
Lead Content Writer & Nutritionist, B.S. Nutrition Science
Sarah was diagnosed with celiac disease in 2018 and writes evidence-based guides combining clinical nutrition knowledge with 6+ years of personal gluten-free living experience.
Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult your physician or a registered dietitian before making dietary changes related to celiac disease. Read full disclaimer.