The concept has been mentioned / suggested at least a few times over the years. I linked some below I found via search. Aside from that (and mentioned in at least one below) is the simple fact that “nutrition” is a topic that is complex on a number of levels and about as contentious as any aspect within our training universe.
So it is something I think would be a rather large challenge and maybe one not in TR’s greater skillset if I’m honest. I think there have been mentions by Nate (even recently?) that opened the subject on a basic level, but nothing ever stated as a goal or actual objective for them from what I remember.