Syzygium cumini (synonym: Syzygium jambolanum or Eugenia cumini) is an original plant from India and the Asian sub-continent. Ayurvedic and Indian Folk Medicine have elaborated the use of this plant for diabetic treatment before the advent of insulin. 5 Based on the biochemical screening of methanolic and aqueous leaves extracts of Syzygium cumini, it showed that those extracts contained alkaloids, saponins, carbohydrates, flavonoids, terpenoids, glycosides and proteins. 6 Moreover, four types of flavonoid compounds are present in leaf extract of Syzygium cumini, quercetin, rutin, ellagic acid and kaempferol. The ethanolic leaf extract showed the highest quantity of quercetin. 7 Caesalpinia sappan L., commonly known as sappan wood or heartwood, is a plant of the Leguminosae family with various medicinal properties, such as skin rashes and excessive body heat, heartburn and indigestion, blood purifier, and diabetes. The pharmacological activity of sappan wood has been proven in various studies, including antioxidant, antibacterial, anti-acne, anti-inflammatory, antihypoglycemic and hepatoprotective. The most abundant water-soluble flavonoid in heartwood is Brazilin which gives red color in the extract. Therefore, sappan wood is also used as a coloring agent for the food, beverages, or textile industry. 8