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If other fermented products are acceptable to you:

* soy sauce, especially tamari
* Worcestershire sauce
* fish sauce (nam pla, teuk trey)
* kombucha
* lacto-fermented ketchup
* non-tomato ketchups
* cheese, especially Parmagiano and Roquefort

Non-fermented foods high in glutamates include pure MSG, bonito, anchovies, tomatoes, most mushrooms, grape juice, and walnuts.