Astragalus, a plant with over 2,000 varieties, is primarily studied for its medicinal effects, particularly in its variety native to China.

In China, astragalus is used in both traditional and modern medicine. Clinical trials have shown the effectiveness of standardized astragalus extracts administered intravenously as an adjunct treatment for various health conditions, such as cancer, heart and liver disorders, severe abdominal trauma, tuberculosis, and aplastic anemia.

Although these practices are common in China, the Western medical community sometimes remains cautious, citing methodological concerns in Chinese clinical trials.

Data from Chinese clinical trials suggest that oral astragalus extracts may help reduce side effects such as nausea, vomiting, and leukopenia associated with cancer chemotherapy, while also potentiating its effectiveness.

In Traditional Chinese Medicine, astragalus has long been used in preparations to strengthen the immune system and prevent viral and microbial respiratory infections, such as allergic rhinitis, chronic bronchitis, influenza, and the common cold.

Some Chinese pharmacopoeia formulations containing astragalus are also used as tonics to support people weakened by illness, aging, or fatigue.

According to Traditional Chinese Medicine, astragalus is renowned for its beneficial effects on heart function. For example, in the traditional preparation Bu Zhong Yi Qi Tang, astragalus is the main ingredient used to treat low energy, fatigue, and strengthen the immune system in convalescents, the chronically ill, women suffering from postpartum depression, the elderly, and others.

Data from clinical trials conducted in China suggest that astragalus, by stimulating the immune system, may help protect cancer patients from opportunistic infections. Animal studies and preliminary clinical data indicate that astragalus promotes the production of immune system cells in healthy subjects.