I recommend reading about the British polar expedition’s issues with scurvy. Long story short: lime juice has much less vitamin C than lemon juice and doesn’t retain it as well during storage. Sometime after the invention of steamships the British navy switched from lemon to lime juice without realizing it made a difference, and it didn’t because they were away from land for shorter intervals. Then they actually spent long times on polar expeditions, and got scurvy until and unless they were able to supplement with fresh meat (in their case seal and penguin, not beef and venison, admittedly). I don’t know if they ate the organ meats or fed those to their dogs or what.
This says nothing at all about the relative vitamin C levels of fresh meat and fresh citrus, but it does demonstrate that fresh meat can be sufficient to ward off scurvy.
