Is fish sauce gluten-free? Usually, check the label

Usually, yes. Traditional fish sauce is fermented fish and salt, sometimes with sugar.

What to check

• Some cheaper fish sauces add hydrolysed wheat protein or other flavourings. Read the ingredients.
• In Thai and Vietnamese dishes, fish sauce is rarely the only sauce: soy sauce, oyster sauce and seasoning sauces often go in too, and those usually contain wheat.

Keep reading

• Is oyster sauce gluten-free?
• Is soy sauce gluten-free?
• Gluten-free Thailand

Sources: Coeliac UK, EU Regulation 1169/2011 and 828/2014, US FDA gluten-free rule and FALCPA, Codex Alimentarius (gluten-free = 20 mg/kg or less). Checked 28 September 2026. We inform, we don’t diagnose: for medical questions, your doctor or dietitian has the last word.