Synonyms: plant starch Molecular formula: (C6H10O5)N CAS No: 9005-80-5 EINECS No: What is Inulin? A fructan and storage carbohydrate, inulin, belongs to a group of naturally-occurring carbohydrates containing non-digestible fructooligosaccharides. Inulin is found naturally in more than 36,000 types of plants worldwide. It is estimated that approximately one-third of the earth's vegetation contain this substance. Because of its presumed health benefits, it is used as a food ingredient