High Risk · Confidence 94%

Can coeliacs eat soy sauce?

Traditional soy sauce is generally not suitable for people with coeliac disease unless the product is specifically labelled gluten-free.

Quick answer

Traditional soy sauce is typically brewed using soybeans and wheat, so it is generally not suitable for people with coeliac disease unless the product is specifically labelled gluten-free. Gluten-free tamari is often a suitable alternative, but not all tamari is gluten-free—always check the label. Under Australian food labelling requirements, verify the ingredient list and allergen declarations on the current packaging because formulations can change. If dining out, ask the venue which soy sauce is used and whether gluten-free alternatives are available.

Why it matters

Traditional soy sauce is typically brewed using soybeans and wheat, so the wheat is part of the fermentation process rather than an optional additive.

Ingredients to watch

• traditional soy sauce
• shoyu

Common gluten source: Fermented wheat

Cross-contamination

Shared bottles and marinade prep in restaurants.

Restaurant & dining advice

If dining out, ask the venue which soy sauce is used and whether gluten-free alternatives are available — it is used widely in Asian cooking.

Shopping in Australia

Under Australian food labelling requirements, verify the ingredient list and allergen declarations on the current packaging because formulations can change.

Safer alternatives

Gluten-free labelled tamari or soy sauce.

Evidence source: Coeliac Australia food-risk guidance · Region: AU