Yeast is not that same as bread, but yeast is required to make bread.

FORBES: The Difference Between Happiness and Engagement at Work

The reason to think Merck may succeed, argues Tim Anderson of Sanford Bernstein, a research firm, is that it has found a way to make biosimilars by culturing them inside yeast cells.

ECONOMIST: Pharmaceuticals

One problem: The medicine is complex and expensive to make (it's grown in vats of yeast).

FORBES

"Sourdough" even became the nickname for California Klondike miners at the turn of the last century because they carried starter in their backpacks to make bread without having to find a town, let alone yeast.

NPR: Sourdough: More than a Bread

Brewers typically make beer by fermenting a sweet, grainy nectar called wort with specific strains of yeast.

WSJ: The Sour and the Glory of Beer

In some cases, certain foods, such as cow's milk, eggs, fish, shellfish, yeast products, nuts, and some food colourings and preservatives, can make symptoms worse.

BBC: Fast-food 'linked to childhood asthma and eczema'