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.
The sailors didn’t just eat meat though… they were typically also eating large amounts of high carb hardtack (biscuits), beans and oats as all were cheap and traveled well. Traditional high carb diets need vitamin C sources or scurvy can occur. A very low carb diet can get by with very little vitamin C because it’s not longer competing with glucose, but of course such a diet was rare in past times. The Inuits diet is one well known exception where the people might go most of a year without plant sources of vitamin C and avoiding deficiencies by eating organ meat which is rich in many vitamins and minerals.
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.