Beans

Fresh green beans are very low in calories (31 kcal per 100 g of raw beans) and contain no saturated fat. Nevertheless, the lean vegetables are a very good source of vitamins, minerals, and plant derived micronutrients

They are very rich source of dietary fiber (9% per100g RDA) which acts as a bulk laxative that helps to protect the mucous membrane of the colon by decreasing its exposure time to toxic substances as well as by binding to cancer-causing chemicals in the colon. Adequate amount of fiber has also been shown to reduce blood cholesterol levels by decreasing reabsorption of cholesterol-binding bile acids in the colon..