Decoder Ring · Slate Podcasts

How Protein Muscled Its Way to the Top

November 19, 2025·45 min·3 clips

Willa Paskin finds protein bragging on everything from Progresso soup to protein pints in a surreal supermarket sweep.

The mystery begins in a grocery aisle. The host moves past Progresso soups, Chobani yogurt, Ratio, and tuna, where protein grams are doing the selling before the food itself gets a word in. This is not really a steak story. It is a story about packaged food learning to talk like a nutrition label, until protein starts to feel less like a nutrient and more like the thing being bought. Then the episode drops into the past. Liebig helped make protein sound like a cultural promise, even though boiling pulverized beef into a gooey extract was a pretty lousy way to get it. The flop did not kill the idea. OxoCubes and Bovril moved into the same space, selling heat, comeback energy, and beefy strength in concentrated form. By the late nineteenth century, protein had status. Scientists studied it, physicians pushed it, and governments urged people to eat more, just as meat became possible for people who had not been able to afford much of it before. That was the first boom. Vitamins took over the spotlight in the 1910s and 1920s, while protein waited around for science to catch up with its messier details. But the old message stuck. More protein sounded strong. Too little sounded weak. The stranger turn comes with the second boom, tied to European concern for colonial subjects. Ghana appears under British colonial control, with the Gold Coast shown through cocoa-tree footage before the story shifts toward deficiency fears and the people being studied. By the end, the number on a soup can feels less innocent. It has science, salesmanship, government pressure, and anxiety packed inside it.

As heard by us

A smart grocery-aisle history of how protein became shorthand for strength, health, and modern food marketing.

Decoder Ring starts in the supermarket, where protein has become impossible to miss: soup cans, yogurt tubs, tuna, pasta, and even Lunchables-style packaging turn gram counts into front-of-package sales copy.

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Why you'd press play

You've noticed protein counts on your soup can printed bigger than the brand name. This is why.

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