I listened to this doctor give a talk at a recent medical conference in Arizona and was blown away by his subject matter knowledge, enthusiasm, charisma, personality, and speaking style. After it was all said and done, I had been sitting there for 3+ hours listening to him talk about weight loss, diet, fitness, exercise research and studies and how to apply them. I was blown away. I feel like I have a PhD in fitness and weight loss now. Totally changed the way I talk to my patients about weight loss. I used to tell them things that, looking back, made no sense. Now that I know a ton more, I totally changed my messaging and my patients are getting results. Finally after 50 years of trying to get my patients to lose weight, they are now actually losing weight. Loven Dr Barker