This doctor's claims made on that podcast have been largely debunked.[0] And his association with a serious-sounding medical group is rather revealing.[1]
JRE as Entertainment? Yes. Accurate guidance on important science issues? Not so much.[2]
[0]https://www.independent.co.uk/news/world/americas/joe-rogan-...
[1]https://www.reddit.com/r/JoeRogan/comments/rgzvr3/something_...
[2]https://www.mcgill.ca/oss/article/covid-19-health-and-nutrit...