Protein-Maxxing: Is It Actually Bad For Us?
Summary
Host Wendy Zuckerman and producer Rose Rimler investigate the conflicting science behind high-protein diets versus protein restriction for longevity. They interview aging biologist Dudley Lamming, who links low protein to extended lifespan in animals, and exercise physiologist Stuart Phillips, who warns that restricting protein can cause muscle loss and immune suppression in older adults. The episode concludes that while extreme protein maxing offers minimal benefits, moderate intake from diverse sources remains the safest approach for human health.
Topics discussed
Introduction: The high protein craze vs. new longevity research
Sponsors: ADT Security and Sallie Mae
Host confession: Protein maxing and the shifting narrative
Dr. Dudley Lamming on protein restriction and lifespan in animals
Reviewing the evidence: Human studies and weight loss mechanisms
The role of FGF21 and brown fat in metabolism
mTOR, autophagy, and the cellular benefits of protein restriction
Sponsors: Indeed, Gatorade, Red Bull, and Visible
Skepticism: Dr. Stuart Phillips on the protein craze
Critiquing the studies: Diet quality and short-term data
Risks for older adults: Sarcopenia and muscle loss
Immune system impacts of low protein diets
Optimal intake: Neutral effects and the importance of protein sources
Protein maxing: Diminishing returns and waste
Ultra-processed protein products and final dietary advice
Outro, citations, and sponsor messages
Listen ad-free on Castria