It would indeed be interesting to see the outcome of a large scale trial with the technology and knowledge we have gained since the 1930s.

I would also like to see how people from different parts of the world would respond to this diet.

Our digestive system adapts to the climate we live in for a long period of time.

Higher protein and fat intake would be important of course, including the need for higher calorie intake, in a colder climate. You would burn more calories to keep warm.