“Eating celery burns more calories than it contains”

The idea that certain foods can cause you to burn more calories digesting them than they contain has been a persistent dieting notion, with celery often held up as the prime example. This "negative calorie" concept suggests that because celery is so low in energy and high in water and fiber, the body expends more energy chewing, breaking down, and absorbing its nutrients than the meager calories it provides. The appealing simplicity of eating your way to a calorie deficit has made this claim widely popular, especially within weight loss discussions.

While celery is undoubtedly a very low-calorie food, typically containing only about 6 to 10 calories per medium stalk, the scientific reality differs from the myth. The energy your body uses to digest food is known as the thermic effect of food (TEF), and it generally accounts for only 5-10% of a food's total caloric value. For celery, this means that digesting a stalk might burn only about half to one calorie. Therefore, the small amount of energy expended in digestion does not come close to outweighing the calories celery provides, resulting in a net caloric gain, however small.

This myth persists largely because of celery's undeniable health benefits and its incredibly low-calorie density, leading many to mistakenly equate "low-calorie" with "calorie-negative." It's an empowering idea that offers a seemingly effortless shortcut for weight management. However, while celery won't magically burn away calories, it remains an excellent choice for a healthy diet, offering hydration, fiber, and essential nutrients without a significant caloric impact.