Miraculin is a glycoprotein extracted from the miracle fruit plant, a shrub native to West Africa (Synsepalum dulcificum or Richadella dulcifica). Local names for the plant include taami, asaa, and ledidi. Miraculin itself isn't sweet, but the human tongue, once exposed to miraculin, perceives ordinarily sour foods, such as citrus, as sweet for up to an hour afterwards. This small red berry has been used in West Africa to improve the taste of acidic foods. Because the miracle fruit itself has… (More on Miraculin)