How many calories does fiber contain?

Fiber is a unique type of carbohydrate that the body cannot fully digest, which is why it is typically said to contain 0 calories. Unlike other carbohydrates, which are broken down into glucose and used for energy, fiber passes through the gastrointestinal tract largely intact. While it can provide some metabolic benefits and contributes to digestive health, fiber does not provide caloric energy in the same way that sugars and starches do. Therefore, when considering its caloric contribution, it is accurate to state that fiber contains no calories. This understanding is important for individuals managing their caloric intake and those focusing on dietary fiber for health benefits.