Dampit Robusta coffee leaf tea (Coffea canephora) potential for kidney stone therapy

Robusta coffee leaf (Coffea canephora) is part of coffee plants that have not been utilized optimally. Coffee leaves contain flavonoids, alkaloids, caffeine, saponins, and other polyphenols that may contribute to prevent degenerative diseases such as kidney stone disease. This study aims to determine the dissolved calcium oxalate levels in-vitro as affected by coffee leaf tea. The experiment was conducted by Completely Randomized Block Design with 2 factors; namely leaf type (old non-oxidative leaf, old oxidative leaf, young non-oxidative leaf, young oxidative leaf) and the second factor was the concentration of coffee leaf tea powder (1%, 3%, 5%). The results showed that differences in leaf type and concentration of coffee leaf tea powder significantly affected the decay of calcium oxalate. The non-oxidative old leaf types with concentration of 5% shows the highest ability to dissolve calcium oxalate.