The present invention relates to an herbal extracts and its preparation method which can effectively promote the growth of neural cells for the purpose of treatment or prevention of Alzheimers disease. Especially the extracts of Angelica sinensis and Acorus tatrinowii.本發明涉及一中草藥萃取物及其製備方法,可有效的促進神經細胞生長,以用於治療或預防阿茲海默症的用途,特別是當歸、石菖蒲之萃取物。
