Decoder Ring

How Protein Muscled Its Way to the TopAmericans are currently besotted with protein. It’s touted as being good for muscle growth, weight loss, skincare, mental acuity, longevity, and much else besides. It’s sold to men, women, children, the elderly— you can even buy protein for your pets. The protein supplement market alone is worth $21 billion and growing—and extra protein is being added to coffee, cereal, pasta, beer, ice cream, and popcorn. But as frenzied as we currently are about protein, this is not the first protein boom—or even the second. Protein has been promoted as a charismatic, cure-all nutrient for nearly two centuries. In this episode, with the help of Samantha King and Gavin Weedon, the authors of Protein: The Making of a Nutritional Superstar, we look closely at all our protein crazes and their associated protein products—from beef tea to whey powder—and see what they can tell us about our current protein mania. This episode was produced by Max Freedman. Decoder Ring is also produced by Willa Paskin, Katie Shepherd, and Evan Chung, our supervising producer. We had editing support from Josh Levin and fact-checking by Sophie Summergrad. Merritt Jacob is Senior Technical Director. If you have any cultural mysteries you want us to decode, email us at DecoderRing@slate.com or leave a message on our hotline at (347) 460-7281. Get more of Decoder Ring with Slate Plus! Join for exclusive bonus episodes of Decoder Ring and ad-free listening on all your favorite Slate podcasts. Subscribe from the Decoder Ring show page on Apple Podcasts or Spotify. Or, visit slate.com/decoderplus for access wherever you listen. Sources for This Episode King, Samantha and Gavin Weedon. Protein: The Making of a Nutritional Superstar, Duke University Press, 2026. Baker, Ryan. “Protein has become America's latest obsession. Companies like General Mills and PepsiCo are capitalizing on it,” CNBC, July 22, 2025. Brock, William H. Justus von Liebig: The Chemical Gatekeeper, Cambridge University Press, 1997. Callahan, Alice. “The More Protein, the Better?” New York Times, April 9, 2025. Draper, Kevin. “America’s Protein Obsession Is Transforming the Dairy Industry,” New York Times, July 16, 2025. Gayomali, Chris. “Big Food Gets Jacked: How protein mania took over the American grocery store,” New York Magazine, Feb. 12, 2025. “The Great Protein Fiasco,” Maintenance Phase, Aug. 31, 2021. Liebig, Justus von. Researches on the Chemistry of Food, Taylor and Walton, 1847. McLaren, Donald S. “The Great Protein Fiasco,” The Lancet, 1974. Oncken, John. “Stingy, 'half-way' dairy farmer's curiosity changed the world,” Wisconsin State Farmer, April 27, 2022. “Subject of Whey Disposal Discussed in UW Bulletin.” Wausau Daily Herald, Aug. 28, 1965. Torrella, Kenny. “You’re probably eating way too much protein,” Vox, Jan. 30, 2024. Wilson, Bee. “Protein mania: the rich world’s new diet obsession,” The Guardian, Jan. 4, 2019. Wu, Katherine J. “Should We All Be Eating Like The Rock?” The Atlantic, Aug. 28, 2023. Learn more about your ad choices. Visit megaphone.fm/adchoices

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Why Do Actors Act Like They Can Sing?When an actor opens their mouth to sing in a movie, chances are high that the voice you hear will be their own. Even in music biopics, movie stars without much singing experience regularly go to great lengths to impersonate the most beloved vocalists of our time. Why not simply play Johnny Cash or Bruce Springsteen’s actual recordings, the reasons why we care about them in the first place? When the world is full of beautiful singing voices, why force Pierce Brosnan to bray his way through Mamma Mia? What you hear when an actor unhinges their jaw is a matter that Hollywood has been negotiating since the dawn of sound. So in this episode, we’ll learn about the “ghost singers” of classic Hollywood musicals, find out why they went extinct, and why today’s music biopics so often fudge the music. Then we leave Hollywood for Bollywood, where the rise of the celebrity “playback singer” shows what can happen when good singing is the highest priority. In this episode, you’ll hear from Slate’s pop music critic Jack Hamilton; musicologist Dominic Broomfield-McHugh, editor of The Oxford Handbook of the Hollywood Musical; Stephen Cole, co-author of a memoir by the ghost singer Marni Nixon; Isaac Butler, longtime Slate contributor and scholar of American acting; and Nasreen Munni Kabir, who has written several books on Hindi cinema and curates Indian films for the UK’s Channel 4. If you want to listen to any of the songs you heard in this episode in full, you can find them all on this Spotify playlist. This episode was written and produced by Max Freedman. It was edited by Willa Paskin and Evan Chung, our supervising producer. Decoder Ring is also produced by Katie Shepherd. Merritt Jacob is Senior Technical Director. If you have any cultural mysteries you want us to decode, email us at DecoderRing@slate.com or leave a message on our hotline at (347) 460-7281. Sources for This Episode Basinger, Jeanine. The Movie Musical! Alfred A. Knopf, 2019. Beaster-Jones, Jayson. Bollywood Sounds: The Cosmopolitan Mediations of Hindi Film Song, Oxford University Press, 2015. Butler, Isaac. The Method: How the Twentieth Century Learned to Act, Bloomsbury, 2022. Hamilton, Jack. “The Problem With Music Biopics Is Bigger Than Just the Cliches,” Slate, May 17, 2024. Kabir, Nasreen Munni. Lata Mangeshkar ...in Her Own Voice, Niyogi Books, 2009. Nixon, Marni with Stephen Cole. I Could Have Sung All Night: My Story, Billboard Books, 2006. Robbins, Allison. “‘Experimentations by Our Sound Department’: Playback Stars in 1930s Hollywood.” Star Turns in Hollywood Musicals, edited by Chabrol Marguerite and Toulza Pierre-Olivier, Presses universitaires de Paris Nanterre, 2017. Srivastava, Sanjay. “Voice, Gender and Space in Time of Five-Year Plans: The Idea of Lata Mangeshkar,” Economic and Political Weekly, vol. 39, no. 20, 2004. Get more of Decoder Ring with Slate Plus! Join for exclusive bonus episodes of Decoder Ring and ad-free listening on all your favorite Slate podcasts. Subscribe from the Decoder Ring show page on Apple Podcasts or Spotify. Or, visit slate.com/decoderplus for access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices

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