Steven Gundry

Steven Gundry is an American cardiologist and author whose The Plant Paradox argues that lectins — proteins in many plants — are a primary driver of chronic disease.

Steven Gundry is a former professor of surgery and paediatric cardiac surgery at Loma Linda University who transitioned to private practice in preventive medicine and became a bestselling diet author with The Plant Paradox (2017). The book’s central argument is that lectins — plant proteins found in foods commonly considered healthy, including beans, whole grains, tomatoes, and peppers — are a major driver of inflammation and chronic disease, and that eliminating or reducing them can produce dramatic health improvements.

Gundry is a credentialed physician who reports significant clinical experience with the dietary protocol he recommends, and some patients describe transformative results. The book is written with confidence and specific clinical detail, and the underlying idea that some plant compounds can trigger inflammatory responses in susceptible individuals is not inherently implausible — certain lectins are indeed harmful in large quantities (raw kidney beans, for instance, are toxic).

However, The Plant Paradox has attracted serious criticism from mainstream dietitians and physicians, who argue that the broader anti-lectin hypothesis is not supported by the weight of nutritional evidence. The foods Gundry recommends restricting — legumes, whole grains, many vegetables — are among those most consistently associated with positive health outcomes in large population studies. Critics also note that Gundry sells a supplement line through his company that is complementary to the dietary restrictions the book recommends, which represents a potential conflict of interest. Readers should approach The Plant Paradox as a speculative hypothesis with anecdotal clinical support rather than an established evidence-based protocol, and consult healthcare providers before making dramatic dietary changes.