White Kidney Bean has been studied in several places, as early as 2007 at UCLA where it has been determined to work a certain predictable way to reduce the effect on starch that is eaten in the daily diet. "Phase 2" is the component that is extracted from this bean, as it has come to be called.
From Science Daily: http://www.sciencedaily.com/videos/2007/0404-weight_loss_weapon.htm
Raspberry Ketones has recently gained prominence in weight loss discussions due to its ability to open up and release the cellular fat stores in the body. This has an energy increasing effect as this energy is released (so don't take it at night).
Together, this is a combination that is a two-pronged approach to weight loss and weight control.