Pectin is a water-soluble substance found in the cell walls of ripe fruits, such as grapefruit, apples and oranges. According to WebMD, grapefruit pectin is useful in lowering cholesterol and triglycerides; it also helps prevent colon and prostate cancers. Although grapefruit pectin has many health benefits, it also has some side effects that you should know about. Find out if … [Read more...] about Grapefruit Pectin Side Effects