What is the benefit of fiber in the diet of older adults?

The benefit of fiber in the diet of older adults primarily lies in its ability to improve digestive health. Dietary fiber plays a crucial role in maintaining regular bowel movements, which is particularly important for older adults who may experience changes in gastrointestinal function. Increased fiber intake can help prevent constipation, a common issue in this age group, and can facilitate healthier digestion overall.

Furthermore, fiber contributes to the health of the gut microbiome, which is increasingly recognized as vital for overall health, including immune system function. By supporting digestive health, fiber can also help manage blood sugar levels and contribute to a feeling of fullness, which can be beneficial in managing weight.

In contrast, the other options do not accurately reflect the role of fiber. It does not promote weight gain; in fact, fiber can assist in weight management by enhancing satiety. Fiber does not contribute directly to building lean muscle, which typically relies on adequate intake of protein. Lastly, dietary fiber is known to help lower cholesterol levels, particularly soluble fiber, making it a heart-healthy component of the diet rather than one that increases cholesterol.