I was browsing some tweets and found this posted recently. An interview with the arctic explorer famous for his fish, meat and fat based way of eating, and the experiment he did on his return to non-Arctic life. The nutrition bit is around 10 mins into the interview. Fascinating to see and hear the man himself. I’ve read quite a bit about how organ meat is important, he says that they fed the organ meat to their dogs because they didn’t like it, except in emergencies.