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?
With a serving size of 20-30g and only 1 g carbs, unfortunately they’re not exploiting labeling. Cucumbers do not have significant carbohydrates, fat or protein and thus neither do pickled cucumbers. Maybe enough carbs to survive but not enough fat or protein, and so you’d end up with protein deficiency and whatever that condition is where people eating just rabbits starve from lack of fat. Probably also a horrific case of heartburn from such an acidic diet.
They do have a decent amount of some vitamins and minerals, and electrolytes such as potassium. It wouldn’t make up for the lack of protein and fat though.