It is believed to balance the spleen, kidney, heart, and liver meridians and to stimulate circulation and the movement of 'chi' or energy. It is considered to be warming to the kidneys and is particularly useful in cold or stagnant conditions. In Ayurveda (traditional Indian system of healing) cassia is referred to as 'twak' and believed to support the respiratory, digestive, nervous, circulatory, urinary, and reproductive systems.