The title is a bit of a bait and switch as the speaker only discusses Vitamin D from 5:30 to 12:30. Rhonda also fields a Vitamin D question from the audience at 46:00.
No one would actually read this if I called it Nutriogenomics and Epigenetics.
Considering that Stefan is very interested in genetic research as it may apply to philosophy, human psychology and child development, Mike should seek out Rhona Patrick for an interview.
This is Rhonda's podcast: https://www.youtube.com/user/FoundMyFitness
The Barbell Shrugged team also interviewed her. She discusses Vitamin D a bit more in this video, starting at 51:00 to the end of the video.
https://www.youtube.com/watch?v=BWa4aJE8YpUt=49:00
Don't forget to get your Vitamin D levels tested! (I just ordered mine.) 70% of Americans do not have adequate levels of Vitamin D in the bloodstream!
https://www.vitamindcouncil.org/testkit/