Viscous versus nonviscous soluble fiber supplements: mechanisms and evidence for fiber-specific health benefits.

Purpose: This review focuses on the health benefits of viscous versus nonviscous soluble fibers, why symptoms can occur with increased fiber consumption, and how to avoid symptoms to improve adherence with a high-fiber diet.

Data Sources: Review of scientific literature as well as evidence-based guidelines and resources.

Conclusions: While it is generally known that "fiber is good for you," it is less well known that specific health benefits are associated with specific fiber characteristics.