Guang Ci Tang offers a full line of over 140 different Chinese herbal formulas, covering a large variety of health concerns. They range from the famous ancient remedies that address concerns related to disorders in Yin, Yang, Qi, Blood etc. to remedies that focus on modern concerns such as blood sugar and stress. Guang Ci Tang products are manufactured in a GMP certified facility and production strictly follows the principle of "authentic materials, traditional preparation, and scientific process". All herbs are extracted and concentrated. They contain no additives, artificial colors or sugar.