If it's not clear (as the article also mentions this), fresh meat does prevent scurvy! Many, if not most animals, internally produce their own vitamin C and so fresh meat is often loaded with vitamin C. Here's a table listing vitamin C content for various meats. That site separates fish from meat, so you need to change the combobox to also see those data.
> Vitamin C can be destroyed by heat and light. High-heat cooking temperatures or prolonged cook times can break down the vitamin. Because it is water-soluble, the vitamin can also seep into cooking liquid and be lost if the liquids are not eaten.
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.
[1] - https://tools.myfooddata.com/nutrient-ranking-tool/Vitamin-C...