Artemisinin or Qinghaosu (pronounced: Ching-hao-su) is an extract from the plant Artemisia annua (sweet wormwood) or Qinghao (pronounced: Ching-hao). Scientific research has shown Artemisinin to be particularly beneficial in balancing the microbiology of the GI tract.

Artemisia annua is a plant with a strong aroma, containing camphor and essential oils. It is a robust plant that grows in many areas of the world. However, only plants grown in special agricultural and geographic conditions contain Artemisinin. The best high-yielding samples have been collected from the steep hills at altitudes over 4,500 feet around Youyang County, City of Chongqing in Szechuan Province, China, where Holley Wulingshan Mountain Pharmaceutical Co., Ltd. is located.

The quantity and quality of Artemisinin are very sensitive to various conditions, such as farming, harvest timing, the pre-manufacturing processing, transportation, extracting and purification processes, manufacturing and storage environments, etc. Even in optimal conditions, Artemisia annua yields very low Artemisinin. 

Artemisia annua leaves have been consumed by local Chinese over several centuries for promoting general health. Its extract, Artemisinin, has been used over several decades in US.‚Äč