Not all modified citrus pectin is the same. How it's made matters a lot. Two numbers tell you if it will work.
The first is the size of the pieces. If they're too big, they can't get past the gut wall. FrutLabs pieces are under 15,000 Daltons. That's small enough.
The second is how the pectin is shaped during processing. This is measured by something called esterification. FrutLabs is at or below 10%. Research sates that range matters.
Most brands hide these numbers. FrutLabs shares them.
The formula is simple. Modified citrus pectin plus vitamin C. No blends. No fillers. Nothing extra that makes it hard to tell what's working.