Ashitaba (Angelica keiskei) is often described as a “longevity herb.” In Japan, it has traditionally been part of their life. Neither purely medicine nor merely food, Ashitaba sits in the liminal space between nourishment and therapeutic support.
In recent years, scientific interest has caught up with this traditional intuition. Researchers have begun to focus on what makes Ashitaba chemically distinct from other green plants: a rare class of compounds called chalcones.
What Is Ashitaba?
Ashitaba is a perennial plant native to Japan, traditionally cultivated along the coast and on volcanic islands such as Hachijō-jima. Its name translates to “tomorrow’s leaf,” referring to its ability to regenerate new leaves quickly after harvesting.
Historically, Ashitaba has been consumed as:
- Fresh leaves (often lightly cooked or battered)
- Teas and infusions
- Dried powders added to foods
Rather than being reserved for illness, it was used as a daily green – part of daily life, seasonal eating, and resilience in environments where nutrition needed to be dense and reliable.
Food or Medicine? Ashitaba’s Role in Japanese Tradition
In Japanese folk use, Ashitaba does not sit neatly in the category of “medicinal herb” in the Western sense. It was traditionally valued for its bitterness, greenness, and vitality, qualities associated with digestive stimulation and balance.
This mirrors a broader East Asian view of plants:
- Bitter greens are thought to wake up digestion
- Chlorophyll-rich foods are associated with clearing and renewal
- Regular consumption matters more than intensity or dosage
Ashitaba was often eaten preventatively, not as a cure, a distinction that modern wellness culture sometimes forgets.
Why Ashitaba Is Biochemically Unique
While many leafy greens contain flavonoids and polyphenols, Ashitaba stands out because it is rich in prenylated chalcones, found in high concentrations in its yellow sap, particularly:
- Xanthoangelol
- 4-hydroxyderricin
Chalcones are a subclass of flavonoids and act as precursor molecules to many other flavonoid structures. What makes Ashitaba unusual is not just the presence of chalcones, but their concentration and diversity, which is rare in edible plants.
These compounds are largely responsible for Ashitaba’s:
- Yellow sap (visible when stems are cut)
- Bitter taste
- Scientific interest in metabolic and cellular research
A Nutritional Powerhouse
Ashitaba is a truly diverse and nutrient-dense plant. Every 100 g of powdered Ashitaba packs a remarkable blend of protein, fibre, vitamins, and minerals, including vitamins A, C, E, and K, plus B‑complex vitamins and folate. On the mineral side, it’s rich in calcium, potassium, magnesium, and iron, all in a highly bioactive whole‑plant form.
What makes Ashitaba stand out is its combination of high fibre and broad micronutrient content, along with unique bioactive compounds called chalcones, which are rarely found in edible greens. This means you’re not just getting vitamins and minerals, you’re getting a plant that supports multiple aspects of cellular and metabolic health in a single, green package.
Modern Research
1. Human Study on Fat Reduction & Obesity Markers
A randomised, double‑blind, placebo‑controlled trial recently published (2024) explored the effects of Ashitaba chalcones (4‑hydroxyderricin and xanthoangelol) in overweight adults. Participants took 16 mg of chalcones per day for 12 weeks.
Findings:
- Visceral fat area was significantly reduced in the chalcone group compared with placebo.
- Waist circumference also decreased significantly by 8–12 weeks.
This study suggests that Ashitaba chalcones may help reduce abdominal fat in overweight individuals. (PubMed)
2. Chalcones & Metabolic Signalling
Chalcone compounds from Ashitaba have been studied in cell models for effects on metabolic pathways:
- In adipocytes (fat cells), Ashitaba chalcones increased adiponectin gene expression and production. Adiponectin is a hormone linked to improved metabolic health and insulin sensitivity. (PubMed)
- Other research shows that these chalcones interact with pathways related to glucose uptake and insulin signalling — potentially helpful in metabolic syndrome contexts (e.g., via AMPK or inhibition of enzymes like PTP1B) — though most of this data is preclinical or mechanistic. (Ijbpas)
These mechanisms help explain why Ashitaba is often studied for metabolic health support, but more human trials are needed.
3. Effects in Metabolic Syndrome Pilot Study
A small pilot study had people with metabolic syndrome consume Ashitaba green juice (~6.2 g/day granulated powder containing ~12.3 mg chalcones) for 8 weeks. After the intervention:
- Visceral fat area, body weight, BMI, and body fat decreased significantly.
- No adverse safety signals were reported on blood chemistry or urinalysis.
This suggests Ashitaba could be safe and potentially supportive for metabolic health in at‑risk adults — though the sample size was small and further research is needed. (CiNii Research)
4. Insulin‑Like & Antidiabetic Activities (Animal & Lab Studies)
Research in animal and cell studies has explored how Ashitaba chalcones behave in glucose metabolism models:
- In diabetic mice, Ashitaba extracts with chalcones showed insulin‑like activity and slowed progression of high blood sugar. (PubMed)
- Separate experiments suggest chalcones enhance glucose uptake and may affect receptors involved in insulin signalling in rodent models. (LPU Laguna)
These results are preclinical (non‑human) but provide insight into potential mechanisms.
5. Muscle & Cellular Health Research
Some studies have looked at Ashitaba compounds for muscle biology and cellular pathways:
- Myoblast differentiation & muscle atrophy models: Ashitaba extract and 4‑hydroxyderricin helped stimulate muscle cell differentiation and mitigate muscle atrophy in rat and cell models. (MDPI)
This area is early but suggests interesting biological activity worth further investigation.
6. Antiviral & Protein‑Targeting Activity
Laboratory research shows that Ashitaba chalcones can interact with viral proteins:
- Chalcones from Ashitaba inhibited key replication proteins of Zika virus in vitro, with measurable activity against viral proteases and polymerase. (PubMed)
This type of research is early, in vitro (in cell cultures), and does not imply a viable therapeutic but indicates rich bioactive potential in these compounds.
7. Broader Bioactivities & Mechanistic Insights
Beyond specific endpoints, scientific literature consistently highlights that Ashitaba’s unique chalcones (especially 4‑hydroxyderricin and xanthoangelol) have multi‑target effects, including:
- Anti‑oxidative and anti‑inflammatory activity
- Modulation of metabolic signalling pathways
- Interaction with enzymes relevant to glucose and lipid metabolism
These effects have been observed across cell and animal models, supporting why the plant is ripe for further clinical exploration. (PubMed)
Tradition Meets Phytochemistry
What’s striking is how closely modern findings align with traditional patterns of use:
- Bitterness → digestive stimulation and metabolic signalling
- Daily consumption → gentle, cumulative effects
- Whole-plant use → synergistic compounds, not isolates
Traditional cultures didn’t need to identify chalcones by name to observe Ashitaba’s effects. Modern science simply gives us a new language to describe what was already known experientially.
Why Interest in Ashitaba Keeps Returning
Ashitaba tends to resurface in wellness cycles because it sits at the intersection of:
- Longevity conversations
- Interest in bitter plants
- Curiosity about autophagy and metabolic health
- A desire for food-based, non-punitive approaches to wellbeing
Modern research into chalcones helps explain why Ashitaba is chemically distinctive. It is the food-as-medicine approach that has supported the longevity of the Japanese population for centuries.


