He also has a regular podcast called "Revero," where he shares his expertise on this topic. Revero is the name of the company he cofounded, which specializes in getting people off pharmaceuticals using diet and other lifestyle changes.

Baker's background is actually that of an orthopedic surgeon. He's also a competitive athlete and played professional rugby in New Zealand for a number of years. As he entered his 40s, he started experimenting with nutrition, and around 2008 got hooked on the ketogenic diet.

From Orthopedic Surgeon to Lifestyle Coach

Around the same time, orthopedic surgeons were told to not operate on morbidly obese patients (a body mass index of 35 or higher) to encourage them to lose weight, thereby lowering their risk of surgical complications and improving outcomes. One thing led to another, and at the end of it all, Baker ended up transforming his career.

"I started suggesting these low carb ketogenic diets with my patients. Not all of them would try it, but some of them did. The ones that did, not only would some of them lose weight, but what was more profound and interesting is they would have a profound reduction in their pain, so much so that many were taken off the OR schedule.