Astragalus What Is Astragalus? Astragalus ( Astragalus membranaceus ) is a revered medicinal root that has been used for centuries in Traditional Chinese Medicine (TCM). Known as Huang Qi , which translates to “yellow life energy,”  this herb gets its name from both its vibrant yellow root and its deep association with vitality, strength, and longevity. In ancient practices, Astragalus was used to strengthen Qi (life force energy)  and protect the body from external stressors