Dr. Chang believes that acupuncture must be assisted by herbology. Acupuncture performs on a functional level of the body's Ki flow and circulation. When the circulation is good but the Yin is low, herbs must be used to regenerate and refuel the body. Through years of experience, Dr. Chang has made herbal formulations to best help his patients with such ailments as: stomach disorders low energy constipation serious bone deficiencies and many more Dr. Chang's formulas have generated great interest among many pharmaceutical companies who would like to see them on the market.