8 Wonderful Benefits of Limestone Limestone (Calcium Carbonate), which is used in betel leaves should be kept in one box always in your home, no, not for the purpose of chewing betel leaves but to have its most potent and effective results in the treatment and management of health problems. It is usually observed and studied that the people, especially the Indians who are habitual of chewing the betel leaves are really good at retaining ability and intelligence. Even, it