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Sweet, salty, sour, bitter ... calcium?

By Jessica Tanenbaum
Globe Correspondent / October 27, 2008

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Yesteryear's researchers wrote of four basic tastes -- sweet, salty, bitter, and sour -- that register on the human tongue. Since then, scientists have acknowledged a fifth taste, umami, a brothy soy sauce flavor emphasized in Eastern cuisine. (Full article: 853 words)

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