Fish sauce are made with anchovies, mackerel, scabbard fish and salt. The bigger the fish, the more mercury you might expect, especially if predator fish like scabbard fish. They do not have any additives like sugar, hydrolyzed protein, or preservatives. Vietnamese prefer sauces without a strong smell, and transparent with a deep golden amber color. "First press" fish sauce, meaning the sauce is bottled from the first time the fermenting barrels are drained, also indicates quality. Lastly, when measuring the nitrogen level of fish sauces (N), most fish sauce on the market falls within the mid 20N range. Anything over 30N is
Fish sauce Fish sauce Fish sauce is a liquid condiment made from fish that have been coated in salt and fermented for up to two years. It is used as a staple seasoning in the cuisines of Southeast and East Asia, particularly Indonesian, Burmese, Cambodian, Filipino, Thai, Lao, and Vietnamese. Following widespread recognition of its ability to impart a savory umami flavor to dishes, it has been embraced globally by chefs and home cooks. The "umami" flavor in fish sauce is due to its glutamate content. Soy sauce is regarded by some in the West as a vegetarian alternative to fish sauce.