A starch-blocker compound studied for its effect on carbohydrate digestion.
White Kidney Bean Extract contains phaseolamin, a compound studied for its ability to inhibit alpha-amylase, an enzyme involved in breaking down starches into absorbable sugars.
The practical idea is that a portion of dietary starch passes through less fully digested, though the clinical effect size in human trials has varied study to study.
It's one of the more mechanism-specific ingredients in this formula, targeting carbohydrate digestion directly rather than metabolism broadly.