Ben Greenfield compared to the rest of my experts is a journalist. Yet, I consider him to be one of the most knowledgable people regarding health. He has a podcast where he has interviewed leading experts in the field of digestion, hormones, nutrition, supplements and much more.
Ben Greenfield is now afraid to experiment
You can find his own podcast at https://bengreenfieldlife.com/
He has also appeared on the JRE show several times
https://www.jrepodcast.com/episode/joe-rogan-experience-1235-ben-greenfield/
https://www.jrepodcast.com/episode/joe-rogan-experience-1120-ben-greenfield/
https://www.jrepodcast.com/episode/joe-rogan-experience-1069-ben-greenfield/