Cassia fistula, also known as amaltas, is considered a beautiful tree which is usually medium in size with large leaves. Its bark, fruits and leaves have been used for medisinal purposes since ancient times. The bark and fruits of this tree have great antioxidant properties and hence, can boost immunity of the body. Regular consumption of the extracts from the bark and fruits can improve natural immune response. In Ayurveda, this tree is used for treating constipation, fever, digestive troubles and skin diseases.