The market · Seasonings and ferments · East Asia, Southeast Asia
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Monosodium glutamate: pure glutamate, the savoury taste of kombu, parmesan and tomatoes, as white crystals. It makes broths, sauces and fried rice taste fuller without tasting saltier.
Kikunae Ikeda identified glutamate as kombu's savoury taste in 1908 and patented MSG; it was on sale within a year. Fears about it, mostly from the late 1960s, haven't held up in controlled studies.
Worth knowing
Add it with the salt, a pinch at a time — a little goes a long way, and too much tastes flat and cloying rather than more savoury. It has about a third of salt's sodium, so it lets you use less salt.