Legume

Japanese Azuki Bean

Provisional Moderate ScoreCompound

Hermetica Superfood Encyclopedia

Published March 15, 2026Last updated March 15, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.

Review flags: AWAITING_SEMANTIC_VALIDATION

Provisional Summary

Japanese Azuki Bean (Vigna angularis) contains flavonoids and saponins that inhibit α-glucosidase by 91.5% and pancreatic lipase by 40%, demonstrating significant antidiabetic and anti-obesity effects. Its polysaccharides activate the insulin-PI3K-AKT pathway, upregulating glucose transport genes including Insr, Irs-1, and Glut-2.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryLegume

GroupLegume

Public Score StatusProvisional Moderate

Primary Keywordjapanese azuki bean benefits

Japanese Azuki Bean — botanical close-up

Reported Benefits (Provisional)

Reduces oxidative stress and inflammation through a rich content of anthocyanins and other polyphenols.

Supports digestive health by enhancing gut motility, alleviating bloating, and promoting regular bowel movements due to high fiber.

Promotes cardiovascular health by regulating blood sugar, improving cholesterol levels, and supporting overall circulatory function.

Boosts immune function with its high iron and folate content, essential for healthy blood production and robust immune response.

Provides sustained energy through its balanced composition of complex carbohydrates and plant-based protein, making it a staple for endurance.

Origin & History

Natural habitat

The Japanese Azuki Bean (Vigna angularis) is a small, reddish-brown legume native to East Asia, particularly Japan, thriving in temperate climates with well-drained, fertile soils. It is a cornerstone of traditional diets, valued for its dense nutritional profile and functional benefits in supporting metabolic and cardiovascular health.

“Japanese Azuki Beans have been a vital part of Japanese cuisine and traditional medicine for over a millennium. Valued in traditional Japanese food culture for their ability to support digestion, improve cardiovascular health, and provide a rich source of antioxidants, they remain a cornerstone of dietary wellness.”Traditional Medicine

Research Narrative (Provisional)

Scientific studies document the blood sugar-regulating, antioxidant, and cardiovascular benefits of Vigna angularis. Research highlights its role in enhancing digestion, supporting heart health, and regulating blood sugar levels, particularly within traditional dietary patterns.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

- Dietary Fiber: Supports digestion, promotes satiety, and enhances bowel regularity. - Plant Protein: Supports muscle growth, repair, and overall bodily function. - Iron: Essential for oxygen transport and energy production. - Folate: Supports cellular regeneration and metabolic health. - Anthocyanins: Potent antioxidants that reduce oxidative damage and support heart health.

Reported Mechanism (Provisional)

Mechanism of Action

Azuki bean flavonoids and saponins inhibit α-glucosidase (91.5% inhibition at 1 mg/mL) and pancreatic lipase (~40% inhibition), reducing carbohydrate breakdown and fat absorption. Polysaccharides activate the insulin-PI3K-AKT signaling pathway, upregulating mRNA expression of Insr, Irs-1, Pi3k, Akt, and Glut-2 genes in diabetic tissue. Polyphenols including proanthocyanidins, catechins, and chlorogenic acid provide additional glucose-lowering effects through α-glucosidase inhibition.

Clinical Narrative (Provisional)

Human clinical evidence is extremely limited, with only one small trial showing azuki bean juice (200 mL daily for 12 weeks) reduced serum triglycerides, though specific reduction values were not quantified. Most evidence derives from animal studies demonstrating blood glucose reduction in type 2 diabetic mice and in vitro enzyme inhibition assays. The pancreatic lipase inhibition was measured at 51.7% activity remaining at 50 µL and 32.6% at 100 µL azuki juice in laboratory conditions. Clinical efficacy in humans requires substantial additional research to establish therapeutic dosing and outcomes.

Also Known As

Vigna angularisAdzuki beanAzuki beanRed beanSmall red bean

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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