Black Rajma from Purola- Yamuna Valley is unique to the region. Grown in the villages of Yamuna Valley, this Rajma is known for its distinct taste and color.
As per https://www.medicalnewstoday.com/articles/289934.php published by MedicalNewsToday, black beans contains iron, phosphorus, calcium, magnesium, manganese, copper, and zinc; they all contribute to building and maintaining a health bone structure. Black beans also contain quercetin and saponins- which help protect the heart. Black beans are naturally low in sodium and contain potassium, calcium, and magnesium, all of which have been found to decrease blood pressure naturally.
Do read the shared link for more benefits of Black beans.