Inulin vs Dextrose: which is worse?

What is Inulin?

Inulin is a naturally occurring prebiotic dietary fiber (fructan polysaccharide) found in chicory root, Jerusalem artichoke, garlic, onions, and bananas. Commercial inulin is extracted primarily from chicory root. It resists digestion in the small intestine and is fermented by beneficial gut bacteria in the colon, promoting growth of Bifidobacterium and Lactobacillus species.

What is Dextrose?

Dextrose is a simple sugar (monosaccharide) derived from corn starch hydrolysis. It is chemically identical to glucose and is the primary energy source for human cells. In food manufacturing, dextrose is used as a sweetener, fermentation substrate, and browning agent. It has a glycemic index of approximately 100.

Documented risks

Inulin: Generally safe and beneficial. At doses above 15–20 g/day, inulin commonly causes bloating, gas, abdominal cramping, and diarrhea due to rapid fermentation in the colon. This is well documented in peer-reviewed research. It is contraindicated for people with fructan intolerance or irritable bowel syndrome following a low-FODMAP diet. At normal food fortification levels (3–8 g/serving), it is tolerated by most adults.

Dextrose: Dextrose has a GI of 100 (the standard reference), causing rapid blood glucose elevation. Excessive consumption contributes to caloric overload, dental caries, and metabolic syndrome risk. However, as a single ingredient it is no more concerning than other simple sugars. The health risks of dextrose are those of added sugar generally, which the American Heart Association and WHO link to obesity, type 2 diabetes, and cardiovascular disease when consumed in excess.