Fructooligosaccharides and inulin are both dietary fibers. Because fructooligosaccharide is a water-soluble dietary fiber, compared with inulin, inulin baby can't eat it, but fructooligosaccharide baby can also eat it. Dietary fiber is indispensable for a healthy diet. Fiber plays an important role in keeping the digestive system healthy. At the same time, taking enough fiber can also prevent cardiovascular diseases, cancer, diabetes and other diseases.

Dietary fiber is a kind of carbohydrate that human body can't digest. According to the solubility in water, it can be divided into two basic types: water-soluble fiber and water-insoluble fiber. Cellulose, hemicellulose and lignin are three common water-insoluble fibers, which exist in plant cell walls. Pectin and gum are both water-soluble fibers and exist in non-fibrous substances in nature. Common foods such as barley, beans, carrots, oranges, flax, oats, oat bran, etc. are rich in water-soluble fiber, which can slow down digestion, expel cholesterol as quickly as possible, help regulate immune system function and promote the discharge of toxic heavy metals in the body. Therefore, the blood sugar and cholesterol in the blood can be controlled above the ideal level, and it can also help diabetic patients improve their insulin levels and triglycerides.

Inulin is a soluble dietary fiber and one of the most soluble dietary fibers found at present, with excellent solubility.