Allergy Research Group, Artemisinin, 300 Vegetarian CapsulesProvides artemisinin, or Qinghaosu, which is the active constituent of the herb Sweet Wormwood (Artemisia annua). Good quality Artemisia annua contains 0. 3 0. 5% artemisinin, so this pure extract provides hundreds of times more of the active constituent artemisinin than the whole herb itself. Allergy Research Group introduced artemisinin to the U. S. market more than three decades ago. Independent cell tests have verified its effectiveness, and