Pectin, a soluble dietary fiber naturally present in citrus fruit, cannot be absorbed by the human digestive tract. However, pectin can be pH modified to shorten the molecular chain. This process creates smaller polysaccharide fragments that are easily absorbed and utilized by the body. Source Naturals Modified Citrus Pectin is made up of very short chains of molecules of the same molecular weigh used in recent scientific studies. The constituents of Modified Citrus Pectin that are believed to be responsible for its beneficial properties are the galactosyl fractions. Their toxin-binding properties may help promote good health.