GAA and diabetes mellitus: These studies have employed the use of extracts from plants, such as Calotropis procera, Calotropis gigantea, Hyophorbe lagenicaulis, Lepidium sativum, Ocimum campechianum, Psiadia punctulata and Ervatamia microphylla, as inhibitors of key enzymes involved in diabetes mellitus, such as alpha glucosidase, aldose reductase and alpha amylase [17,18].