Banana leaves are packed with plant-based compounds called polyphenols such as epigallocatechin gallate, or EGCG, which is also found in green tea. Polyphenols are natural antioxidants that battle free radicals and prevent diseases. While banana leaves are not easy to digest if eaten directly, the food absorbs the polyphenols from the leaves, so that you get the benefit of the nutrition.It is also believed that the leaf has anti-bacterial properties that kill all the germs in the food, thereby reducing the chances of you falling sick