Natural Carb Blocking Nutrient: The White Kidney Bean plant, also known and Phaseolus vulgaris, is grown in South America, Europe and the West Indies. White kidney beans are useful as a weight loss agent because the beans contain a carbohydrate or starch blocker.
White Kidney Bean keeps the body from absorbing as many calories and carbohydrates, and thereby stops up to one third of the carbohydrates you eat each day from becoming stored as fat. This results in less calorie absorption and is useful to help you quickly lose weight
If you are anything like some people that want to know exactly how all of this works, here is some great info:
Phaseolus vulgaris stops the enzyme from cutting, so the starches stay in the body as long fibers and are burned off quicker — making losing weight and keeping a normal blood sugar much easier. Patients in the clinical studies who took white kidney bean extract lost body fat, not lean muscle.