Why Do Zero-Calorie Foods Not Actually Exist?

💡 The Answer

• Every food contains some caloric energy — even so-called zero-calorie foods like celery and watercress.
• The myth arose because some foods contain fewer calories than the body uses to digest them.
• However, the net caloric difference is negligible and the body still absorbs energy from these foods.
• Nutrition labelling laws allow foods with under 5 calories per serving to be labelled as zero-calorie.