Is there such a thing as "immune boosting" supplements? Should you eat the core of an apple? Does "bullet-proof" coffee really make you bullet proof? Are probiotics important? Is an all-beef diet a good idea? What is a "go to the park" prescription from a doctor? Is there any downside to caffeine? (hint - only in 2 circumstances). These are just a few of the questions best-selling author and physician Dr. James Hamblin addresses in this week's episode!