Daniel Lieberman, a Harvard biology professor, discusses his book “Fed Up” and its attempt to assess whether popular diets actually work. In the project, Lieberman uses his background in evolutionary anthropology to scrutinise claims made for diet trends and describes trying multiple diets himself, positioning his own experience as a form of real-world testing.
The reporting and podcast coverage focus on how diet fads spread widely on social media, with different approaches—ranging from paleo and keto to raw food and intermittent fasting—developing dedicated followings. Across the sources, the emphasis is on separating scientific evidence from marketing and anecdote rather than promoting a single eating plan. In the interview, Lieberman also addresses which diet he has kept in his routine, although the broader framing remains an evidence-led evaluation of what is supported and what is less clear. The discussion highlights uncertainty and the limits of diet research, while pointing readers toward more careful appraisal of the scientific basis for dietary advice.
