Gastropod · Cynthia Graber and Nicola Twilley

From Fountain of Youth to Fruit on the Bottom: How Yoghurt Finally Made it Big in America

November 18, 2025·51 min·3 clips

Metchnikoff brought a shabby old dog and a sprightly 70-year-old parrot to his 1904 Paris lecture to prove yogurt could prevent aging.

Yogurt starts with milk left out too long. Gastropod, being Gastropod, turns that into a story about a food that is creamy, divisive, and somehow parked in every corner of the grocery aisle. One host is only mildly impressed. The other can point to fruity yogurt, Greek yogurt, drinkable yogurt, Icelandic yogurt, and frozen yogurt. So how did this fermented milk pick up a reputation as a cure-all, with immortality hanging around the story? The trail begins in old places and old appetites. Across the Balkans, the Middle East, the Caucasus, and Central and South Asia, yogurt appears in old texts and on old tables. People liked it early, and they kept talking about it as unusually good for the body. That is where the glow starts. Then Francis I enters, ruling what the episode calls a France with no yogurt. The legend gives him a bad stomach and a bad mood, which makes court politics sound uncomfortably digestive. If his stomach settled, maybe the ruler would too. Suleyman the Magnificent comes into the story when Francis asks the Ottoman Empire for a doctor. The doctor, described as Jewish, crosses continental Europe with sheep so he can make yogurt from their milk. Supposedly, it works. Francis calls yogurt the elixir of life, and France gets a kinder ruler, at least in the legend. Still, yogurt does not take off. Royal approval is not enough, so the episode has centuries left to cover, plus starfish somehow waiting ahead. It ends back in the kitchen, where yogurt is an afternoon snack with either chocolate chips or olive oil, salt, and pepper.

As heard by us

A witty science-and-history tour of how yogurt became a health food, grocery staple, and cultural oddity.

Yogurt sounds almost too ordinary for mythmaking, but Gastropod finds plenty to work with: milk transformed by fermentation, an ancient reputation for health, and a modern supermarket aisle crowded with plain, fruity, Greek, drinkable, Icelandic, frozen, Dannon and Yoplait-style…

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Why you'd press play

You want the story behind yogurt's journey from ancient staple to the modern grocery aisle.

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