Nuoc Mam (Fish Sauce)
The salty fish sauce on every Vietnamese table, and why it matters when you check a meal.
Nuoc mam is Vietnamese fish sauce. It is made from fermented fish and salt, and it is the savoury base of dipping sauces, marinades and many soups.
How will you meet it on the trip?
It sits on the table in a small bottle or dish, and it is mixed into the dip that comes with fresh rolls, pancakes and rice plates. The dip is usually lighter than the bottle, mixed with lime, sugar and chilli.
You may not see it listed on a menu. Cooks add it to a dish out of habit, so ask if it matters to you.
What should you check at the table?
Say clearly what you avoid, such as fish, shellfish or pork. Ask whether the dip, the soup base or the marinade includes fish sauce. For halal, the question is wider than one sauce: ask about the stock and the kitchen too.
Never assume a stall is halal. Our meal and prayer checks list the questions to ask.
Which related terms will you see?
- Mam tom: a stronger fermented shrimp paste.
- Nuoc cham: the prepared dipping sauce built on nuoc mam.
- Tuong: a soy or bean sauce, used as an alternative dip.
More food guidance sits in Food and daily travel.
If ingredients are a worry for your group, tell us who is travelling and what you avoid, and we will help you plan meals and questions you can use at the table.
Common questions
What does nuoc mam taste like?
On its own it is very salty and sharp, with a deep savoury smell. In dishes it is mixed with lime, sugar, garlic and chilli, which softens it into a balanced dipping sauce. Start with a small dip, since a little goes a long way.
Is fish sauce in every dish?
Not every dish, but it is in a great many dips, soups, marinades and dressings. It can be in a dish that looks plain. If you avoid fish or shellfish, tell the staff clearly and ask about the sauce, the soup base and the marinade.
Is fish sauce a problem for Muslim travellers?
Fish is not the usual concern, but the wider dish, the stock and the kitchen can involve pork. Fish sauce itself is made from fish, so ask about the whole meal. Look for a displayed certificate and its issuer rather than judging by one ingredient.
Keep planning
If ingredients are a worry for your group, tell us who is travelling and what you avoid, and we will help you plan meals and questions you can use at the table.