OptiFiber Lean 180 CapsulesOptiFiber Lean features Shimizu Propol A propolmannana highly pure, natural soluble fiber. Propol A is created from Amorphophallus konjac derived glucomannan using proprietary processing techniques. This fiber has been studied for its viscosity and for its stability through the digestive tract; and studies support its health effects, such as on satiety, weight control, glucose and lipid metabolism, and bowel regularity.* *Follow recommended dosing, or