Dr. Fenglei Wang

This episode covers a large Harvard study on healthy aging with researcher Dr. Fenglei Wang, following 105,015 people for up to 30 years. It found that people who ate more red and processed meat were less likely to reach older age free of chronic disease, while plant-dominant diets, nuts, and unsaturated oils were linked to healthier aging. The episode's provocative 'worse than junk food' framing goes beyond what the study shows: red and processed meat, sugary drinks, sodium, and trans fats were each independently linked to less healthy aging, but that is not a ranking that makes one food causally worse than another. The core message lines up with mainstream nutrition science. The main caveat is that this is observational research: it shows strong associations, but can't fully prove cause and effect on its own.