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 They discuss how outdated nitrogen balance studies established protein recommendations, while historical factors like the meat industry and bodybuilding culture drove the obsession.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
Listen ad-free on Castria