Fibersol from TwinLab:

Fibersol Is The Highest Potency And Most Concentrated Fiber Supplement Available.

Fibersol Capsules contain natural, bulk producing, soluble dietary fiber derived from fruit, vegetable and grain. Each capsule provides the benefits of gum, pectins, hemicelluloses and polysaccharides which are so important for maintaining the proper pace and bulk required for healthy digestive function. Fibersol also encourages normal and natural elimination without chemical stimulants. Fibersol is the highest potency and most concentrated fiber supplement available. Approved for allergy sensitive individuals.