Phase 2® Carb Controller is an all-natural, non-stimulant white bean extract that is used as an ingredient in a variety of nutritional supplements. It is the first carbohydrate blocker clinically proven in multiple studies to delay the digestion and absorption of carbohydrates. This, in turn, reduces the caloric impact of starchy foods, and also lowers the glycemic index.

When used in conjunction with a sensible diet and exercise, Phase 2 may assist in weight control. While there is no such thing as a magic weight control pill, Phase 2 may enable people concerned with weight control and/or blood glucose levels to enjoy carb-rich foods again in moderation.

Phase 2 is a key ingredient in nutritional supplement products available at food, drug and mass market stores across the US and worldwide.

Phase 2 has been the subject of multiple clinical studies that have proven its safety and effectiveness. In 2006, the US Food & Drug Administration conducted an extensive review of clinical data and information on Phase 2, and announced that it does not object to weight control and starch reduction claims for Phase 2, and supplements containing it. With this announcement, Phase 2 became the first nutritional ingredient with two permitted structure/function claims: "May assist in weight control when used in conjunction with a sensible diet and exercise program," and "May reduce the enzymatic digestion of dietary starches."