Mieshelle Nagelschneider is an American cat behaviorist, author of the eponymously titled book The Cat Whisperer and founder of The Cat Behavior Clinic in Portland, Oregon..

Bessel van der Kolk is a Boston-based Dutch-American psychiatrist, author, researcher and educator.

Peter Attia is a Canadian-American author and former researcher known for his work in longevity medicine.

Christopher McDougall is an American author and journalist.

Michael Herschel Greger is an American physician, author, and speaker on public health issues best known for his advocacy of a whole-food, plant-based diet, and his opposition to animal-derived food products.