‘Miracle fruit’ turns sour things sweet

The small fruit has the color of a cranberry, the shape of an almond and tastes like a flavorless gummy. But after chewing the fruit and rubbing the pulp against the tongue, the berry, known by a promising name — “miracle fruit” or Synsepalum dulcificum — releases a sweetening potency that alters the taste buds. For about 15 to 30 minutes, everything sour is sweet