“Eating celery burns more calories than it contains”

The appealing notion of foods that burn more calories than they provide has long captured the public's imagination, with celery often at the forefront of this popular belief. The idea likely stems from celery's extremely low-calorie content and its fibrous texture, which can make it feel like an effort to chew and digest. This sensation contributes to the misconception that the body expends a significant amount of energy processing it, perhaps even more than the food itself contains.

Scientifically, while celery is indeed a very low-calorie vegetable, it does not possess "negative calories." A single stalk of celery typically contains about 6 calories. The body does expend energy to digest food, a process known as the thermic effect of food (TEF). For celery, digesting a stalk burns roughly 0.5 calories. This means that while celery is incredibly light on calories and a healthy choice, the thermic effect of food for it is approximately 8% of its caloric content, far from exceeding 100%.

The persistence of this myth is understandable given celery's nutritional profile. It is largely water and fiber, contributing to a feeling of fullness without adding many calories. This makes it a popular snack for those managing their weight, and the extensive chewing required might further reinforce the idea that it's "working off" calories. However, while celery is a valuable part of a balanced diet due to its vitamins, minerals, and hydration, it's important to understand that no food truly results in a net calorie deficit through digestion alone.