The kidney bean is a variety of the common bean.Red kidney bean also known as rajma in India.The kidney bean is a variety of the common bean. It is named for its visual resemblance in shape and – for the red variety – colour to a human kidney.Red kidney beans contain relatively high amounts of phytohemagglutinin, and thus are more toxic than most other bean varieties.Nutritionists often recommend beans as part of a healthy diet because of their high nutritional value. Like other beans, kidney beans can be counted as both a protein source or a vegetable.
Eating at least a half-cup of beans per day can improve overall health. According to one study, people who eat beans daily consume less fat and saturated fat while taking in more fiber, protein, folate, iron, and other important minerals.