What is a primary characteristic of fiber in the diet?

Fiber is a primary component of plant-based foods and is notable for its ability to help regulate blood sugar levels. This regulation occurs because fiber slows the digestion and absorption of carbohydrates, leading to a more gradual release of glucose into the bloodstream. As a result, consuming fiber-rich foods can help prevent spikes in blood sugar, which is particularly important for individuals with diabetes or those aiming to manage their blood sugar levels.

Additionally, fiber contributes to overall digestive health and satiety, but its role in regulating blood sugar is a key aspect of why it is considered beneficial in the diet. Unlike the other options mentioned, fiber does not provide energy in the form of calories, it is not a source of protein, and while some types of fiber can help with the absorption of certain nutrients, fiber itself doesn’t contain vitamins that can be absorbed in the same way that fats and proteins do.