Angelica sinensis

Angelica sinensis, commonly known as dong quai, contains ferulic acid and ligustilide compounds that modulate estrogen receptors and inflammatory pathways. Clinical research shows it may improve quality of life in endometrial cancer patients and reduce cancer recurrence when used as adjunct therapy.

Origin & History

Angelica sinensis, commonly known as Dong Quai or Danggui, is a perennial herb native to China, Japan, and Korea, belonging to the Apiaceae family, with its dried root used medicinally. The plant is primarily harvested from high-altitude regions in Gansu Province, China, and processed through water decoction or alcohol extraction to yield bioactive compounds including phthalides, phenylpropanoids (ferulic acid, caffeic acid), and polysaccharides.

Historical & Cultural Context

Angelica sinensis root (Danggui) has been used for over 2,000 years in Traditional Chinese Medicine to 'tonify blood' and treat gynecological disorders, anemia, and pain, with documentation in historical texts like Shennong Bencao Jing. It remains a cornerstone herb in TCM formulas for women's health and circulation, though its use has spread to other cultures with varying applications.

Health Benefits

• Improved quality of life in endometrial cancer patients when used as adjunct therapy (meta-analysis of 9 RCTs, n=700, MD = −5.89, 95% CI [−6.65, −5.13], P < 0.05) • Reduced cancer recurrence risk in endometrial cancer patients (4 RCTs, RR = 2.93, 95% CI [1.97, 4.35], P < 0.05) • Enhanced immune function with increased NK cells and CD4+ T cells (moderate evidence from cancer studies) • Cardioprotective effects against doxorubicin-induced toxicity (preliminary evidence from animal studies, 15 g/kg dose) • Anti-inflammatory and antioxidative effects through Nrf2-mediated pathways (preliminary evidence from mechanistic studies)

How It Works

Angelica sinensis exerts its effects primarily through ferulic acid and ligustilide, which modulate estrogen receptor activity and inhibit nuclear factor-kappa B (NF-κB) inflammatory signaling. The polysaccharide components enhance immune function by activating macrophages and increasing natural killer cell activity. These compounds also regulate apoptosis pathways and angiogenesis through VEGF modulation.

Scientific Research

A 2024 meta-analysis (PMID: 40411686) of 9 randomized controlled trials with up to 700 endometrial cancer patients showed significant improvements in quality of life, pain reduction, and lower recurrence risk when angelica-based formulas were used as adjunct therapy. However, a phase II RCT (NCT00199485) testing Dong Quai for hot flashes in men on androgen deprivation therapy found no significant benefit versus placebo.

Clinical Summary

A meta-analysis of 9 randomized controlled trials with 700 endometrial cancer patients demonstrated significant quality of life improvements (MD = −5.89, 95% CI [−6.65, −5.13]). Four RCTs showed reduced cancer recurrence risk with a relative risk of 2.93 (95% CI [1.97, 4.35]). Additional studies suggest immune system enhancement, though most research focuses on combination therapies rather than isolated angelica sinensis. Evidence quality varies, with larger trials needed to confirm individual compound effects.

Nutritional Profile

Angelica sinensis (Dong Quai) root contains the following characterized compounds and approximate concentrations based on published phytochemical analyses: Phthalides (volatile oils, 0.4–0.7% of dry weight) — primary bioactive fraction including Z-ligustilide (25–45% of essential oil), butylphthalide, and butylidenephthalide; these exhibit high lipophilicity and moderate oral bioavailability (~30–40% in rodent models). Ferulic acid (0.05–0.1% dry weight) — a hydroxycinnamic acid derivative considered a primary water-soluble bioactive marker; bioavailability enhanced by gut microbiota demethylation. Polysaccharides (15–25% dry weight) — including APS-1, APS-2, and APS-3 fractions composed of arabinose, galactose, glucose, and rhamnose units; these are largely non-digestible in the human upper GI tract, exerting immunomodulatory effects via gut-associated lymphoid tissue. Coumarins (0.2–0.5% dry weight) — including osthole, psoralen, and bergapten; note photosensitizing potential at higher doses. Protein: approximately 15–22% dry weight with a moderate amino acid profile including arginine, proline, and cysteine. Crude fiber: approximately 22–30% dry weight (largely lignocellulosic, limited fermentable fraction). Minerals detected: potassium (~12–15 mg/g dry weight), calcium (~3–5 mg/g), magnesium (~2–3 mg/g), iron (~0.1–0.3 mg/g — relevant to traditional use in blood deficiency syndromes), zinc (~0.05–0.1 mg/g). Vitamins: limited data; trace B vitamins including folate (~10–20 mcg/100g dry) and niacin equivalents; not a clinically significant dietary vitamin source. Lipids: ~1–2% dry weight, predominantly polyunsaturated fatty acids. Bioavailability note: Z-ligustilide undergoes rapid first-pass metabolism; ferulic acid peak plasma concentration reached ~1–2 hours post-oral administration in human pharmacokinetic studies; polysaccharide immunomodulatory activity is primarily local (gut-mediated) with limited systemic absorption of intact polymers.

Preparation & Dosage

Clinical studies used Angelica sinensis in multi-herb formulas (angelica-based decoctions) for cancer patients, though specific standardized dosages were not detailed. Animal studies used water extract at 15 g/kg orally, but human equivalent doses were not specified. No standardized extract dosage ranges were established in the available clinical research. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Ferulic acid, Caffeic acid, Traditional Chinese herbs, Immune-supporting mushrooms, Antioxidant compounds

Safety & Interactions

Angelica sinensis may increase bleeding risk and should be avoided with anticoagulant medications like warfarin due to coumarin content. Common side effects include photosensitivity, gastrointestinal upset, and potential allergic reactions. It's contraindicated during pregnancy and breastfeeding due to uterine stimulant properties. Patients with hormone-sensitive cancers should consult healthcare providers before use due to estrogenic activity.