The star ingredient responsible for an airy, bubbly pizza crust is yeast. As cells that eat sugar and convert into carbon dioxide, yeast is what makes dough rise – yet Italian scientists have ...

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Ernesto Di Maio is severely allergic to the yeast in leavened foods. "I have to go somewhere and hide because I will be fully covered with bumps and bubbles on the whole body," he says. "It's really ...