Anthony Chaffee is an American MD living in down under. He does a top-notch breakdown in this video. It may sound like a LOT of information for the uninitiated, however! He deals with patients and that's as empirical as it gets. Great info. He practices what he preaches -- "he walks the walk and talks the talk"
Someone in the YouTube comment section said
"I own a medical practice with over 3500 patients. Every patient who is eating like this is THRIVING. The rate of cardiovascular disease, diabetes, obesity and cancer in my practice is incredibly low! Fruit, grain and vegetables might help you survive if you don't have meat but only meat, egg, seafood and butter will help you thrive! Keep up the great work Dr. Chaffee!"
That's as empirical as it gets!!