I'm not certain why the sub-forum title has Nutrition as part of it's wording.
What we are concerned with more on the bike is stuff that we need to do during the ride, for a short time after and maybe shortly before. While long term diet does affect overall health, that's not really what should be discussed in depth here, IMO.
The bigger concern here I'd think is something that one might consider as fueling for a ride. Not pushing ones dietary nutrition advice.
To me this diet or that diet are much like political discussions and belong in foo or some other sub-forum.