Science Friday Science Friday

Why is everyone so obsessed with protein?

Nov 4, 2026 · 18m

Summary

Host Flora Lichtman explores the origins and science behind the current protein craze with food historian Dr. Hannah Cutting-Jones and nutrition researcher Dr. Christopher Gardner. They discuss how outdated nitrogen balance studies established protein recommendations, while historical factors like the meat industry and bodybuilding culture drove the obsession. The guests explain that most Americans already consume sufficient protein, and that excess intake is converted to fat rather than stored.

Topics discussed

Sponsors and show introduction The rise of the protein maxing trend Origins of the 50-70g daily protein recommendation Do Americans actually need more protein? Historical context: 1840s to 1900s protein science 1950s bodybuilders and early protein supplements Meat industry influence on 1992 food pyramid 2003 studies linking protein to weight loss The POUNDS LOST study and protein stability Why the body cannot store excess protein Whey and soy: sources of commercial protein Commercial break and sponsor messages History of fiber maxing and John Harvey Kellogg Cultural trends: protein vs. fiber perception The science of fiber and the gut microbiome Advocating for whole food maxing Amino acid profiles in plants vs. meat Future of personalized fiber and microbiome Guest introductions and foraging call to action Production credits and sign-off
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