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Ban4.0

Banaba Research

Mostly mechanism / observational

10 peer-reviewed studies

What the evidence says

Mostly mechanism / observational

Most Banaba studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.

Most evidence is from high-quality randomised trials published 2003–2026 with a typical study size of 31 participants.

Based on 10 studies · 5 RCTs · 31 total participants

Confidence

Moderate confidence

By outcome

Glucose & metabolicMay lower post-meal blood glucose (small human trials; insulin-like mechanism) · 2-8 weeks · Insulin-like glucose-uptake support · 2-8 weeks
Mostly mechanism / observational6 studies

Steady research

2 studies in the last 5 years

200320142026

1Systematic Review2007

Ulbricht C, Dam C, Milkin T, Seamon E, Weissner W, Woods J · J Herb Pharmacother (2007)

2RCT2014

Choi MS, Ryu R, Seo YR, Jeong TS, Shin DH, Park YB · Food Funct (2014)

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3RCT2022

López-Murillo LD, González-Ortiz M, Martínez-Abundis E, Cortez-Navarrete M, Pérez-Rubio KG · J Med Food (2022)

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4RCT2016

Manaf A, Tjandrawinata RR, Malinda D · Drug Des Devel Ther (2016)

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5RCT2003

Judy WV, Hari SP, Stogsdill WW, Judy JS, Naguib YM, Passwater R · J Ethnopharmacol (2003)

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6Review2026

In plain English: By synthesizing these findings, we aim to identify critical knowledge gaps and propose a structured roadmap with specific, hypothesis-driven future research directions required to rigorously assess CA's translational potential and pave the way for potential clinical applications.

Xu X, Zhao Z, Zhang J, Shi L, Gao W, Yang X, Zhang X, Liu L, Xu Y. · Frontiers in pharmacology (2026)

However, despite numerous in vitro and animal studies elucidating potential mechanisms involving pathways like AMPK, NF-κB, YAP, and various kinases, a critical gap exists between this promising preclinical data and robust clinical validation.
We particularly scrutinize the evidence supporting its roles in metabolic regulation and cancer therapy, highlighting areas where mechanistic insights remain superficial or conflicting.
By synthesizing these findings, we aim to identify critical knowledge gaps and propose a structured roadmap with specific, hypothesis-driven future research directions required to rigorously assess CA's translational potential and pave the way for potential clinical applications.

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7Crossovern=31 · small study2006

In plain English: A controlled trial (n=31) found corosolic acid lowered post-challenge plasma glucose levels.

Fukushima M et al. · Diabetes Res Clin Pract (2006)

Corosolic acid lowered post-challenge (post-meal) plasma glucose
Small controlled trial (n=31)
Acute glucose-lowering signal

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8Review2012

In plain English: A review summarized the efficacy and safety of banaba (Lagerstroemia speciosa) for glucose control.

Stohs SJ et al. · Phytother Res (2012)

Banaba (corosolic acid, ellagitannins) is associated with lower blood glucose
Insulin-like / GLUT4 glucose-uptake mechanism
Human evidence is limited and from small studies

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9In Vitro2008

In plain English: A study identified insulin-like glucose-uptake compounds from Lagerstroemia speciosa.

Bai N et al. · J Agric Food Chem (2008)

Identified insulin-like glucose-uptake compounds from banaba
Cell-based mechanistic study
Supports the anti-diabetic rationale

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10Review2007

In plain English: An animal study reported anti-diabetes and anti-obesity activity of a standardized banaba leaf extract.

Klein G et al. · Evid Based Complement Alternat Med (2007)

Anti-diabetes and anti-obesity activity in animal models
Preclinical (not human)
Standardized leaf extract

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View in Research Library

Banaba Research

Mostly mechanism / observational

Banaba (Lagerstroemia speciosa L.): an evidence-based systematic review by the Natural Standard research collaboration.

The beneficial effect of soybean (Glycine max (L.) Merr.) leaf extracts in adults with prediabetes: a randomized placebo controlled trial.

Effect of Banaba (Lagerstroemia speciosa) on Metabolic Syndrome, Insulin Sensitivity, and Insulin Secretion.

Insulin sensitizer in prediabetes: a clinical study with DLBS3233, a combined bioactive fraction of Cinnamomum burmanii and Lagerstroemia speciosa.

Antidiabetic activity of a standardized extract (Glucosol) from Lagerstroemia speciosa leaves in Type II diabetics. A dose-dependence study.

A review of the pharmacological mechanism of corosolic acid

Effect of corosolic acid on postchallenge plasma glucose levels.

A review of the efficacy and safety of banaba (Lagerstroemia speciosa L.) and corosolic acid.

Active compounds from Lagerstroemia speciosa, insulin-like glucose uptake-stimulatory/inhibitory and adipocyte differentiation-inhibitory activities in 3T3-L1 cells.

Antidiabetes and Anti-obesity Activity of Lagerstroemia speciosa.