Phaseous Vulgaris is an extract of the Northern White Kidney Bean. In clinical studies it has been shown to clearly inhibit the production and activity of alpha amylase, the enzyme responsible for the breakdown of starch into sugar. Human studies show that Phaseous Vulgaris can effectively inhibit intestinal amylase activity, thereby preventing dietary starch digestion and the corresponding after-meal rise in insulin concentration. Phaseous Vulgaris attaches to the carbohydrate molecule at precisely the point at which alpha-amylase normally would split the compound to yield dextrins. The complex carbohydrate is not broken down into absorbable sugars and simply passes out of the body undigested.