glutamate in fish sauce
MSG remains controversal, but glutamate is found naturally in many natural sourcesâincluding fish sauce, mushrooms, tomatoes, and walnutsincluding fish sauce, mushrooms, tomatoes, and walnuts.Masan's product Nam Ngu fish sauce are displayed for sale at a market in Hanoi (Photo: Nguyen Huy Kham/Reuter).ish sauce is an indispensable ingredient in the cooking of Vietnam, Thailand, Burma, Cambodia, Laos, and the Philippines.