There was a competing theory that scurvy was prevented by eating fresh meat, and that's easier to get in the arctic: https://idlewords.com/2010/03/scott_and_scurvy.htm
[1] - https://tools.myfooddata.com/nutrient-ranking-tool/Vitamin-C...
In "The Terror" (A supernatural horror story by Dan Simmons, set in the lost Franklin expedition) it is raw meat that saves the indigenous people from scurvy. Which is probably not too inaccurate.