Dan is a perpetual student, and I admire him for that brand of self-directed study; it's a genuine passion, and he is truthful.
The MD is the caller who's sharing her testimony of her life shift after three weeks on fruit and vegetables. She is MD trained and did some residency, then lost faith in the system...Watch at 13:00 minutes, and again at 20:00 minutes when he asks her again, -are you an MD- to verify.