Angelica dahurica, known in classical Chinese medicine as Bai Zhi, is the dried root of a tall herbaceous plant native to Northeast China. Acrid and warm in nature, entering the Lung, Stomach, and Large Intestine channels. The classical indications are specific: headache, particularly frontal and supraorbital, nasal congestion with discharge, abdominal pain, and skin conditions with discharge.
The aromatic profile is distinctive. The active compounds are coumarins, particularly imperatorin, isoimperatorin, and byakangelicin. These molecules are responsible for the herb’s anti-inflammatory and analgesic effects, and for its observed interactions with the gut microbiota.
Modern research has examined Bai Zhi’s polysaccharides in animal models, with high-throughput sequencing of gut bacterial populations. The findings are consistent with the classical framing: the herb alters gut microbial composition in directions associated with improved metabolic and inflammatory profiles. Studies have specifically explored its potential in obesity-related liver conditions, where the herb appears to influence the gut-liver axis through microbial intermediation.
The herb is also being studied for what classical Chinese medicine describes as “hormone deficiency patterns”, conditions like postmenopausal symptoms where the gut microbiome plays a recognized role in hormonal metabolism. The estrobolome research published in the last several years gives a clearer mechanistic picture of what classical practitioners observed clinically.
Bai Zhi is in Chorus Gut Harmony as one of the sixteen botanicals chosen for the gut-brain axis. It is also a component of several classical formulas in our Herb Market.
References
Hu, Qing, et al. “Angelica sinensis polysaccharide improves rheumatoid arthritis by modifying the expression of intestinal Cldn5, Slit3 and Rgs18 through gut microbiota.” International Journal of Biological Macromolecules 209 (2022): 153-161.
Luo, Yu, et al. “High-throughput sequencing technology reveals polysaccharides from Angelica dahurica that affect gut microbiota in mice.” Biotechnology & Biotechnological Equipment 35.1 (2021): 1934-1940.
Xu, Yu, et al. “Colon-Targeting Angelica sinensis Polysaccharide Nanoparticles with Dual Responsiveness for Alleviation of Ulcerative Colitis.” ACS Applied Materials & Interfaces (2023).
Xu, Jun, Hu-Biao Chen, and Song-Lin Li. “Understanding the molecular mechanisms of the interplay between herbal medicines and gut microbiota.” Medicinal Research Reviews 37.5 (2017): 1140-1185.
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