Regarding this, why are there no calories in pickles?
Pickles are, of course, made from cucumbers, and cucumbers are themselves a “negative-calorie food” because they're so sparse in calories. Dill pickles made from cucumbers, for example, have 17 calories per cup. So they're still a negative-calorie food because it takes more than 17 calories to consume and digest them.
Similarly one may ask, are pickles good for weight loss?
Including pickles in your diet as a healthy snack can help you shed pounds, thanks to their low calorie count. A cup of dill pickles — regular or low sodium — has just 17 calories. Even if you're following a very restricted diet of 1,200 calories per day, that's less than 2 percent of your daily calorie allowance.
The bottom line: Aside from water, no truly calorie-free food or drinks exist. Why do so many things say they have zero calories, then? The FDA legally allows manufacturers to label anything with less than five calories as having zero calories.