Natural Flow 5X Prebiotic Fiber Complex

Our verdict

Natural Flow 5X Prebiotic Fiber Complex works out to $0.22 per serving of inulin (prebiotic fiber), at 1serving per serving in capsule form. That puts it below the median of the 11 inulin (prebiotic fiber) products we can price per dose, where the typical serving costs $0.22, a Value Index of 1.0 where the median product is 1.0. One container lasts 120 days at the label dose of 1 serving a day, about $6.74 a month. We could not verify a third-party certification for Natural Flow Supplements in a public registry. Worked out from the current retail price as of 2026-11-13; confirm the live price on Amazon.com before buying.