Which of the following is a health benefit of dietary fiber?

Dietary fiber plays a significant role in health, particularly regarding its ability to help control blood sugar levels. When consumed, fiber slows down the digestion and absorption of carbohydrates, which helps to prevent rapid spikes in blood glucose following meals. This stabilizing effect on blood sugar aids in the management of conditions such as diabetes and can also promote satiety, which can be beneficial for weight management.

In contrast, options that suggest increasing muscle mass or boosting the immune system do not directly relate to the function of dietary fiber. While fiber is essential for digestive health and can contribute to overall wellness, it does not primarily influence muscle growth or immune responses in a direct manner. Additionally, saying it reduces hydration needs is misleading, as adequate fiber intake typically requires increased fluid intake to support its digestive benefits and prevent issues like constipation. The primary health benefit of fiber is indeed its role in regulating blood sugar levels.