Is Fish Sauce vegan?
Short answer
Fish Sauce is not vegan. Fish sauce is fermented anchovies. Not vegan.
Key takeaways
- Verdict: Fish Sauce is not vegan.
- Commonly found in: Pad thai, Vietnamese pho and dipping sauces, Thai curries, Som tum.
- Vegan alternatives: Vegan fish sauce (Three Crabs Vegan, Ocean's Halo), Soy sauce + miso + a splash of mushroom water + seaweed.
- Also listed as: nuoc mam, nam pla, patis.
- Scan any barcode with VeggieOS (100% free) for an instant vegan verdict.
Also known as: nuoc mam, nam pla, patis
What it is
A salty umami sauce made from fermented small fish and salt.
Why not vegan
Always animal-derived.
What a “Not vegan” verdict means
A not-vegan verdict means the ingredient is animal-derived in essentially all commercial supply, so a product listing it should be treated as non-vegan unless the manufacturer explicitly states a plant-based source in writing.
Where you'll find it
- Pad thai
- Vietnamese pho and dipping sauces
- Thai curries
- Som tum
At a glance
| Verdict | ❌ Not vegan |
|---|---|
| Ingredient family | Seafood derivatives |
| Also listed as | nuoc mam, nam pla, patis |
| Typical products | Pad thai, Vietnamese pho and dipping sauces, Thai curries, Som tum |
| Best vegan swap | Vegan fish sauce (Three Crabs Vegan, Ocean's Halo) |
| Settled by certification? | Not required |
How to read the label
Fish Sauce belongs to the seafood derivatives family. These are the terms worth scanning for on any ingredient list in this category:
- Fish sauce
- Nam pla
- Bonito
- Katsuobushi
- Dashi
- Shrimp paste
- Belacan
- Oyster sauce
- Chitosan
- Glucosamine
- Read the allergen box for 'fish', 'crustaceans' and 'molluscs'.
- In Thai, Vietnamese and Filipino food assume fish sauce unless told otherwise.
- Japanese dishes: ask for 'katsuo dashi nashi' — kombu dashi is the vegan alternative.
- Choose algal DHA and EPA supplements rather than fish or krill oil.
Mistakes to avoid
| Where it catches people out | What to do |
|---|---|
| Vegetable curry in a Thai restaurant | Fish sauce is the base seasoning; ask for soy sauce instead. |
| Kimchi | Traditional recipes include salted shrimp or fish sauce; vegan kimchi is widely available. |
| Worcestershire sauce | Anchovy is a core ingredient in the classic formulation. |
Seafood derivatives in context
Fish and shellfish derivatives are used for flavour, texture and nutrition: fish sauce and shrimp paste in Southeast Asian cooking, bonito dashi in Japanese cooking, omega-3 oils in supplements, and chitosan and glucosamine from shells.
Fish and crustaceans are declarable allergens in the EU, UK and US, so packaged products must state them — but restaurant and street food carry no such obligation, which is where most accidental consumption happens.
Substitutes are unusually good in this family: fermented seaweed and soy replicate the umami of fish sauce closely, and algal oil is the original source of the omega-3 that fish accumulate.
Does certification help? Allergen labelling makes packaged seafood derivatives easy to spot; the gap is unpackaged and restaurant food, where a direct question is the only tool.
Vegan alternatives
- Vegan fish sauce (Three Crabs Vegan, Ocean's Halo)
- Soy sauce + miso + a splash of mushroom water + seaweed
FAQ
- Will vegan fish sauce taste the same?
- Very close — seaweed and mushroom carry the umami; brands like Ocean's Halo are widely used in vegan restaurants.
- What replaces fish sauce?
- A soy sauce and seaweed blend, or a commercial vegan fish sauce made from fermented pineapple, seaweed and shiitake.
- Is seaweed vegan?
- Yes. Seaweed is a plant-equivalent marine organism and is one of the few reliable dietary iodine sources for vegans.
Sources
Last reviewed June 4, 2026