Almost every jar of pickles claims a serving of pickles has zero calories. Now clearly, this is incorrect and the result of exploiting some ridiculous FDA loophole, since anyone knows that cucumbers provide calories.
So let's say you're in a situation where you lose all access to food, but you've got effectively unlimited access to pickles -- like, you're trapped inside a recently abandoned pickle warehouse.
Could you conceivably eat enough pickles to survive for a month? Two months? Or would your body just shut down from all the sodium and acid?
If you're also drinking water and only eating a few pickles a day for the salt and mineral content, you can water fast safely for a good while if you have enough body fat.
Folk with morbid obesity have safely water fasted up to a year.
The pickles would only be sustaining you so far as salt and minerals though, your body fat would be doing the rest to keep you alive.
Folk with morbid obesity have safely water fasted up to a year.
With medical supervision, supplements for vitamins & nutrients, and other considerations for their particular condition. Certainly not something a person should do on their own.