Nicknamed “female ginseng,” Chinese angelica (Angelica sinensis) has reigned for over two thousand years as the essential plant for women’s health in Traditional Chinese Medicine. Mentioned in the Shennong Bencao Jing as early as 200-300 AD, it remains one of the most prescribed plants by practitioners of Chinese medicine, both in Asia and the West. But what does modern scientific research really say about this revered root?
Active compounds identified by science
Chemical analysis of Angelica sinensis root reveals a remarkably complex phytochemical composition. Researchers have identified more than seventy different compounds, grouped into three main categories. Phthalides constitute the dominant family, with Z-ligustilide as the major compound, representing 61 to 69% of the essential oil. This molecule represents between 1.26 and 37.7 milligrams per gram of dried root, according to studies.
Organic acids form the second category, with ferulic acid being the most abundant and most studied. This compound also serves as a quality marker to assess the authenticity and concentration of Chinese angelica preparations. Finally, polysaccharides, thirty-six of which have been identified to date, complete this molecular profile and contribute to the plant’s immunomodulatory effects.
A study published in 2024 in Frontiers in Pharmacology compared different commercial grades of Chinese angelica. The researchers demonstrated that the third-grade product contained the highest concentrations of ferulic acid, ligustilide, senkyunolide I, uridine, and guanine, directly correlating with the greatest antiplatelet activity.
Effects on blood circulation: experimental evidence
Research on the circulatory properties of Chinese angelica has yielded compelling preclinical results. A Chinese animal model study showed that administering 20 grams per kilogram of Dang Gui reduced ADP-induced platelet aggregation by 87.9% and collagen-induced aggregation by 33%. These impressive percentages demonstrate significant anticoagulant activity. Isolated Z-ligustilide exhibits even more specific effects. In a rat model of arteriovenous shunting, oral administration of 10 milligrams per kilogram of ligustilide reduced thrombus weight from 46.4 milligrams (control group) to 19.5 milligrams. At 40 milligrams per kilogram, this weight dropped to 13.6 milligrams. Maximum platelet aggregation decreased from 44.6% in the control group to only 6.8% and 2%, respectively.
Ferulic acid acts via a complementary mechanism. Research on rabbits fed a high-fat diet revealed that this compound increases endothelial nitric oxide production, thereby inhibiting platelet aggregation, smooth muscle cell proliferation, and leukocyte adhesion to the endothelium. These three combined actions effectively prevent atherosclerosis.
Documented action on microcirculation
A fascinating discovery concerns the improvement of microcirculation. Researchers administered T500 dextran to rabbits to induce constriction of connective tissue capillaries, then treated the animals with Z-ligustilide. The results show that this compound accelerates the recovery of capillary and venule diameter, increases the number of open capillaries, and improves blood flow.
These effects on microcirculation likely explain some of the benefits traditionally attributed to Chinese angelica for “nourishing the blood” in Chinese medicine. Improved tissue perfusion means optimized oxygenation and cellular nutrition, which is particularly important for sensitive tissues like the uterus.
Hematopoietic Effects: Enriching the Blood
A 2024 study published in Frontiers in Pharmacology explored the effects of Chinese angelica polysaccharides on blood cell formation. Researchers created a blood deficiency model in mice using acetylphenylhydrazine and cyclophosphamide. Administration of Angelica sinensis polysaccharides significantly increased serum levels of erythropoietin, granulocyte colony-stimulating factor, and interleukin-3, while reducing tumor necrosis factor alpha.
These results scientifically support the traditional use of Dang Gui as a blood tonic. Polysaccharides directly stimulate blood cell production and modulate the inflammatory environment that can inhibit hematopoiesis.
What do clinical studies say in women?
Here, the results become more nuanced and sometimes disappointing. The most rigorous clinical study, published in 1997 in Fertility and Sterility, evaluated seventy-one menopausal women over 24 weeks. Researchers measured endometrial thickness, vaginal maturation index, and menopausal symptoms. The result: no statistically significant difference between the Dang Gui group and the placebo group regarding hot flashes or the other parameters measured.
Another study on men treated for prostate cancer also failed to demonstrate the effectiveness of Dong Quai on hot flashes. These results suggest that Chinese angelica used alone, unlike its traditional use in compound formulas, does not produce significant estrogenic effects.
The European Medicines Agency concluded in 2012 that Angelica sinensis does not meet the criteria of the European directive on traditional herbal medicinal products, citing insufficient evidence of documented use in Europe and preliminary toxicological concerns.
Precautions and Drug Interactions
Several studies warn of potential adverse effects. One case report describes a woman who developed severe hypertension after consuming Dong Quai postpartum. Her blood pressure reached 195/85 mmHg, and that of her breastfed son reached 115/69 mmHg. Both returned to normal 48 hours after discontinuation.
In vitro research shows that aqueous extract of dong quai (angelica dongai) stimulates the proliferation of MCF-7 breast cancer cells in a dose-dependent manner, with weak estrogenic activity. A 2021 study even demonstrated a tumorigenic risk in estrogen receptor-positive breast cancer stem cells. Women with a history of hormone-dependent cancers should therefore avoid this herb.
- Finally, dong quai interacts with several medications. It potentiates the anticoagulant effects of aspirin and clopidogrel in mice and strongly induces clozapine metabolism, according to two case reports. Patients taking anticoagulants or antipsychotics should consult a doctor before taking any supplements.
- The paradox between tradition and clinical evidence
- Chinese angelica perfectly illustrates the challenge of adapting traditional medicine to modern Western medicine. In Chinese medicine, Dang Gui is rarely used alone but almost always in complex formulas, treated by sulfur fumigation or sautéed in wine, and prescribed according to a precise energetic diagnosis. Western clinical trials generally test isolated, standardized extracts on populations not selected according to TCM criteria.
- This methodological difference likely explains the discrepancy between spectacular results in animals and clinical failures in humans. Preclinical studies nevertheless validate the pharmacological mechanisms: improved circulation, stimulation of hematopoiesis, and anti-inflammatory and antioxidant effects. Chinese angelica undoubtedly possesses measurable biological activity, even if its clinical efficacy remains to be better demonstrated in rigorous controlled trials.
- Cited scientific sources :
- https://pubmed.ncbi.nlm.nih.gov/38953103/
