You know, sailors used to get scurvy because of C deficiency back a couple centuries ago. Vitamin C degrades really easily, but is there any way you can store it long term other than pills or tablets? I’m just wondering if it would have been possible to do this in the past with the technology that was available.
I think it was also very common for the fresh meats and salted meats to be depleted quickly, and the line sailors only left with the high carbohydrate food for months.