Hermetica Superfood Encyclopedia
The Short Answer
Ban Lan Gen (Isatis indigotica root) contains indirubin and isatin as key bioactive compounds that exhibit antiviral and anti-inflammatory properties. These compounds work by inhibiting viral replication and modulating immune responses, particularly interferon production.
CategoryTraditional Chinese Medicine
GroupTraditional Chinese Medicine
Evidence LevelModerate
Primary Keywordban lan gen benefits
Synergy Pairings3
Ban Lan Gen (Isatis indigotica root) — botanical close-up
Health Benefits
Enhances immune response by stimulating the production of interferon, a protein that fights viruses. - Reduces fever by promoting sweat production, which helps cool the body naturally. - Supports respiratory health by soothing sore throats and reducing mucus, aiding in easier breathing. - Acts as an anti-inflammatory agent, reducing swelling and pain in the body. - Provides antiviral properties by inhibiting viral replication, crucial during cold and flu seasons. - Boosts energy levels by improving blood circulation, leading to increased oxygen delivery to cells. - Aids in detoxification by supporting liver function, helping to cleanse the body of toxins.
Origin & History
Natural habitat
Ban Lan Gen is derived from the root of the Isatis indigotica plant, native to China. It is typically dried and used in herbal preparations.
“Historically, Ban Lan Gen has been used in Chinese medicine to treat fevers and infections. It is also a popular remedy during flu seasons in China.”Traditional Medicine
Scientific Research
Research indicates that Ban Lan Gen may have antiviral and antibacterial properties. Some studies have shown effectiveness in treating respiratory infections, but more research is needed.
Preparation & Dosage
Traditional preparation
Commonly prepared as a decoction or tea. Dosage should be determined by a healthcare provider.
Nutritional Profile
Ban Lan Gen (Isatis indigotica root) is a medicinal herb rather than a dietary staple, so macronutrient content is minimal in typical therapeutic doses (3-15g dried root or 10-15ml liquid extract). Key bioactive compounds include: Indigo and indirubin (alkaloid pigments, approximately 0.1-0.8% of dry weight), which contribute to antiviral and anti-inflammatory activity; Isatin (oxindole alkaloid, ~0.05-0.2% dry weight) with demonstrated antiviral properties; Epigoitrin (L-epigoitrin, a thiocyanate compound, ~0.3-1.2% dry weight), considered a primary antiviral biomarker used for quality standardization; Sinigrin (glucosinolate precursor, ~0.5-1.0% dry weight), which hydrolyzes to allyl isothiocyanate. Polysaccharides (approximately 8-15% dry weight) contribute significantly to immunostimulatory effects, including arabinogalactans. Amino acids present include arginine, proline, and glutamic acid at trace levels (~1-3% total protein equivalent). Mineral content includes iron (~12-18 mg/100g dried), calcium (~200-300 mg/100g dried), potassium (~400-600 mg/100g dried), and magnesium (~80-120 mg/100g dried). Flavonoids including clemastanin B and lariciresinol are present at ~0.1-0.5% dry weight. Vitamin C is present in small amounts (~5-15 mg/100g dried root). Bioavailability note: Water decoction (boiling 20-30 min) extracts polysaccharides and water-soluble alkaloids efficiently (~60-80% extraction); indirubin and indigo have low oral bioavailability (~10-20%) due to poor water solubility, though absorption is enhanced in traditional decoction formulas. Epigoitrin is readily bioavailable in aqueous preparations.
How It Works
Mechanism of Action
Ban Lan Gen's primary compounds indirubin and isatin inhibit viral neuraminidase and RNA polymerase, preventing viral replication. These alkaloids also stimulate interferon-alpha and interferon-gamma production through activation of toll-like receptors. Additional flavonoids like quercetin provide anti-inflammatory effects by inhibiting NF-κB signaling pathways.
Clinical Evidence
Small-scale studies involving 60-120 participants have shown Ban Lan Gen extracts may reduce upper respiratory infection duration by 1-2 days compared to placebo. In vitro studies demonstrate antiviral activity against influenza A and B viruses, with IC50 values of 15-25 μg/mL for standardized extracts. However, large-scale randomized controlled trials are limited, and most evidence comes from traditional use and preliminary research.
Safety & Interactions
Ban Lan Gen is generally well-tolerated with mild gastrointestinal upset reported in some users at doses above 15g daily. May interact with anticoagulant medications due to potential effects on platelet aggregation. Contraindicated in individuals with glucose-6-phosphate dehydrogenase deficiency due to risk of hemolytic anemia. Pregnancy and breastfeeding safety data is insufficient, requiring medical supervision.
Synergy Stack
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Also Known As
Isatis indigoticaRadix IsatidisChinese Woad RootIndigo WoadDa Qing Ye rootBLGIsatis Root
Frequently Asked Questions
What is the recommended dosage of Ban Lan Gen?
Traditional dosages range from 9-15g of dried root daily, typically prepared as decoction or tea. Standardized extracts are commonly dosed at 300-600mg three times daily during acute symptoms.
How long does Ban Lan Gen take to work?
Initial effects on fever and throat discomfort may be noticed within 24-48 hours of starting treatment. Full respiratory benefits typically develop over 3-5 days of consistent use.
Can Ban Lan Gen prevent colds and flu?
While traditional use suggests preventive benefits, scientific evidence for prevention is limited. Some studies indicate it may reduce infection severity rather than prevent illness entirely.
Is Ban Lan Gen safe for children?
Ban Lan Gen has been used traditionally in pediatric populations, but dosages should be reduced to 3-6g daily for children. Professional medical guidance is recommended for children under 12 years.
What are the active compounds in Ban Lan Gen?
The primary bioactive compounds include indirubin (0.01-0.05%), isatin, β-sitosterol, and various flavonoids including quercetin. Indirubin and isatin are considered the main antiviral constituents.
Does Ban Lan Gen interact with common medications like antibiotics or antivirals?
Ban Lan Gen may potentiate the effects of antiviral medications due to its own antiviral properties, so concurrent use should be discussed with a healthcare provider. There are no well-documented major interactions with antibiotics, but as with any herbal supplement, it's important to inform your doctor about Ban Lan Gen use if you're taking prescription medications. Individual responses may vary based on dosage and personal health status.
Who should avoid Ban Lan Gen, and are there specific health conditions that contraindicate its use?
People with cold or deficient spleen-yang according to Traditional Chinese Medicine theory should generally avoid Ban Lan Gen, as it is classified as a cold-natured herb. Those with autoimmune conditions should consult a healthcare provider before use, as immune-stimulating herbs can theoretically trigger or worsen autoimmune responses in susceptible individuals. Individuals with allergies to plants in the Brassicaceae family may experience cross-reactivity.
What does clinical research show about Ban Lan Gen's effectiveness for viral infections compared to placebo?
Multiple clinical studies from Traditional Chinese Medicine research have demonstrated that Ban Lan Gen reduces the duration and severity of upper respiratory infections when taken early in symptom onset, though many studies are conducted in China with varying methodological rigor. A systematic review suggests Ban Lan Gen shows promise for viral prevention and treatment, but high-quality randomized controlled trials by Western standards remain limited. The evidence is stronger for symptomatic relief and immune support than for absolute prevention of viral illness.
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