NOW® Ache Action™ contains Decursinol-50, a whole root extract from the plant Angelica gigas Nakai, commonly known as Korean Angelica. The technique used to produce Decursinol-50 yields a high concentration of the major active compounds of the root: decursinol and decursin. Ache Action™ is further enhanced with Aquamin® Red Algae Minerals, a natural source of calcium and over 70 trace minerals.