Originally from Erik Arnesen, via a retweet by Miki Ben-dor:
Inuit metabolism revisited: what drove the selective sweep of CPT1a L479?
Coconuts and Cornstarch in the Arctic?
The P479L gene for CPT-1a and fatty acid oxidation
The abstract looks very nice, I can't wait to get hold of the full text!
Edit: The paper is long and somewhat repetitive. There is a much neater paper from Amber which people might enjoy:
Evidence on chronic ketosis in traditional Arctic populations