Astragalus membranaceus and Angelicae sinensis are highly synergistic, meaning they are more powerful when taken together. This combination is traditionally called Dang-gui buxue tang.

The starting point for the preparation of Dang-gui buxue tang in traditional Chinese medicine is 30 grams of Astragalus membranaceus root paired with 6 grams of Angelicae sinensis. This is a 5:1 ratio, which is ideal for extracting the bioactive ingredients of the plants.

Astragalus membranaceus can also be supplemented via a root extract. Due to potential differences in the quality/efficiency of the extraction process among different commercial manufacturers, product label recommendations for dosage should be followed and you should consult with your pharmacist or personal physician before taking.

The main bioactive compound in Astragalus membranaceus is astragaloside IV, which can be supplemented by itself. The standard dose for astragaloside IV is 5–10 mg.