There's research in neurodietetics, for example https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3105244/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3105244/ I c

There's research in neurodietetics, for example https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3105244/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3105244/ I can't quite tell how strong each and every paper in the field is, nor would this be the place to do it, but what I recognize as their foundational observation that Holocaust survivors brains were roughly the same size as of normally fed people, while other organs shrunk, is quite striking.