Ashitaba
Angelica keiskei
Description
overall appearance
A large, robust perennial herb in the carrot family, growing 50–120 cm tall; notable for its bright yellow-green sap (chalcone-rich) that exudes from cut stems; regrows rapidly after cutting (name means 'tomorrow's leaf' in Japanese, implying that if cut today, new growth appears tomorrow).
roots
Stout taproot with fibrous laterals; tan to light brown; aromatic when cut; accumulates chalcones and other bioactive compounds
stem
Hollow, ridged, green to purplish; 1–3 cm in diameter at base; covered in fine hairs; exudes distinctive yellow latex when cut, containing xanthoangelol and 4-hydroxyderricin
leaves
Large, 2–3 pinnately compound; leaflets broadly ovate, 5–12 cm long, coarsely toothed; dark glossy green; sheaths clasp the stem; long petioles; entire plant has a distinctive celery-like aroma
flowers
White to greenish-white, typical compound umbels 10–20 cm across; numerous small flowers; bloom in summer to autumn
fruits/seeds
Cremocarp (double achene) 5–8 mm, flattened, winged; typical of the Apiaceae family; dispersed by wind
Active Compounds
Traditional Uses
- Hachijojima Island tradition: consumed daily as a longevity vegetable by the famously long-lived island population; 'tomorrow's leaf' symbolizing vitality and renewal
- Traditional Japanese Kampo medicine: used for general debility, blood purification, and to invigorate the body; classified as warming and tonifying
- Traditional use in Izu Islands for colds, fever reduction, and respiratory infections
- Folk use in Japan for stomach complaints, digestive weakness, and poor appetite
- Traditional topical application of yellow sap to wounds and skin infections for antiseptic effects
- Regional longevity tonic: prepared as tempura, salad, or tea; believed to extend lifespan by residents
- Traditional use in Japan for anemia and fatigue due to high iron and B12 content
- Folk preparation as poultice for joint pain and inflammation on the Izu Islands
Modern Applications
- Autophagy induction: xanthoangelol chalcones shown to strongly induce autophagy in vitro and in animal models — proposed anti-aging mechanism; Willnow et al. 2017 identified chalcones as potent AMPK activators
- Anticancer: xanthoangelol demonstrates apoptosis-inducing and anti-proliferative effects in multiple cancer cell lines (breast, colon, leukemia)
- Anti-inflammatory: chalcones strongly inhibit COX-2, NF-κB, and inflammatory cytokines comparable to pharmaceutical anti-inflammatories in vitro
- Metabolic syndrome: improves insulin sensitivity, reduces visceral fat, and lowers blood glucose in animal studies; AMPK activation mechanism
- Neuroprotective: chalcones protect against neuroinflammation and oxidative neuronal damage; potential in Alzheimer's and Parkinson's models
- Antimicrobial: chalcone extracts show activity against MRSA, Candida, and H. pylori
- Antiviral: chalcones demonstrate inhibition of influenza, HIV, and other viruses in vitro
- Cardiovascular protection: reduces LDL oxidation and platelet aggregation in preliminary studies
⚠️ Safety Information
Contraindications
- Pregnancy and breastfeeding: furanocoumarins and strong bioactive compounds warrant avoidance at medicinal doses
- Photosensitivity: furanocoumarins (bergapten) increase UV sensitivity; avoid sun exposure after application to skin
- Anticoagulant therapy: antiplatelet effects of chalcones may increase bleeding risk with warfarin
- Pre-surgical period: discontinue 2 weeks before surgery due to antiplatelet and autophagy-inducing properties
- Hypersensitivity to Apiaceae family (carrot, parsley, celery allergy) — cross-reactivity possible
- Immunosuppressive therapy: autophagy induction may interfere with some immunosuppressive medications
Side Effects
- Photosensitization reactions: bergapten content may cause rash, blistering with UV exposure
- Gastrointestinal discomfort with high-dose supplementation
- Mild hypotension possible with large doses due to vasodilatory effects of chalcones
- Possible interference with drug metabolism via CYP enzyme modulation (furanocoumarins)
- Contact dermatitis from fresh plant handling in sensitive individuals
- Headache reported with very high doses in some individuals
Drug Interactions
- Anticoagulants (warfarin): antiplatelet activity of chalcones increases bleeding risk; monitor INR
- CYP3A4 substrates: furanocoumarins inhibit CYP3A4 (similar to grapefruit); may raise levels of many medications including statins, calcium channel blockers, immunosuppressants
- Antidiabetic medications: additive blood glucose lowering via AMPK activation; monitor closely
- Antihypertensives: additive hypotensive effect possible at high doses
- Photosensitizing drugs (tetracyclines, fluoroquinolones, thiazides): additive photosensitivity risk
Parts Used
- Fresh leaves and stems (eaten as vegetable)
- Dried leaf powder (supplement)
- Yellow sap/chalcone-rich extract
- Root (traditional decoction)
- Whole herb tea
Preparation Methods
Ashitaba leaf tea: 2–3 g dried leaf in 250 ml boiling water, steep 5–10 minutes; drink 2× daily
Fresh leaf consumption: 50–100 g fresh leaves daily as vegetable (tempura, salad, stir-fry) — traditional longevity dose
Ashitaba powder (standardized): 500–3000 mg daily in capsules; standardized to chalcone content
Chalcone extract: 50–100 mg xanthoangelol equivalent daily in standardized supplements
Ashitaba tincture: 1:5 in 60% ethanol; 2–4 ml 2–3× daily
Fresh sap (topical): apply yellow sap directly to wounds, acne, or skin inflammation
Related Plants
Angelica
Angelica archangelica
Celery Seed
Apium graveolens
Coriander
Coriandrum sativum
Pu-erh Tea
Camellia sinensis var. assamica
Alfalfa
Medicago sativa
Aloe Vera
Aloe barbadensis