ByDr. Brennan Commerford, Chiropractic Physician·Last reviewed: April 2026
All Ingredients
Specialty1 form

Banaba (Lagerstroemia speciosa L.) Leaf Extract

Preferred Form
Leaf Extract
Bioavailability
S2
Evidence Level
Moderate Evidence

Quick Answer

What is the best form of Banaba (Lagerstroemia speciosa L.) Leaf Extract?

Leaf Extract is our top-ranked form of Banaba (Lagerstroemia speciosa L.) Leaf Extract, classified as T1 Preferred with S2 bioavailability. We compared 1 forms in our formulary.

Our recommendation: Leaf Extract

1forms compared

All Forms of Banaba (Lagerstroemia speciosa L.) Leaf Extract

FormTierBioavailabilityDose RangeUnit
Leaf ExtractT1 PreferredS2

Bioavailability by Form

S2 — Good
Leaf Extract

What is Banaba (Lagerstroemia speciosa L.) Leaf Extract?

Banaba (Lagerstroemia speciosa L.) Leaf Extract is a Specialty supplement available in 1 form.

Not all forms of Banaba (Lagerstroemia speciosa L.) Leaf Extract are equal. The form you choose determines how much Banaba (Lagerstroemia speciosa L.) Leaf Extract actually reaches your tissues, and the difference between the best and worst forms can be substantial. Banaba leaf extract standardized for corosolic acid content is the preferred form for supporting healthy blood glucose metabolism. Research suggests corosolic acid promotes insulin-like glucose uptake activity, and standardized extracts provide consistent potency compared to non-standardized leaf preparations.

Forms of Banaba (Lagerstroemia speciosa L.) Leaf Extract Compared

Banaba (Lagerstroemia speciosa L.) Leaf Extract (1% Corosolic Acid) Preferred (T1 Preferred) has a bioavailability rating of good (S2). Typical dose range: not yet documented in our database.

What the Research Shows

Banaba leaf extract (Lagerstroemia speciosa) contains corosolic acid, a pentacyclic triterpene that supports glucose transporter (GLUT4) activation. Research demonstrates its ability to support healthy post-meal blood sugar responses. The extract provides a botanical approach to metabolic health support.

How to Choose the Right Form

Banaba (Lagerstroemia speciosa L.) Leaf Extract (1% Corosolic Acid) is classified as T1 Preferred in the FormulaForge formulary — our top recommendation for Banaba (Lagerstroemia speciosa L.) Leaf Extract. It carries a bioavailability rating of good (S2), meaning more of the active compound reaches your tissues per dose unit compared to lower-tier forms.

When choosing a Banaba (Lagerstroemia speciosa L.) Leaf Extract supplement, look for the S1 (best absorption) bioavailability tier on the label or formulary listing. T1 Preferred forms have the strongest research-backed evidence for efficient absorption.

Other forms may be appropriate depending on individual goals, cost considerations, and your healthcare provider’s guidance. The best form for you depends on your specific health needs.

Dosing & Safety

For Banaba (Lagerstroemia speciosa L.) Leaf Extract (1% Corosolic Acid), the typical dosing range is not yet documented in our database. Individual dose requirements vary based on health goals, body weight, and existing nutrient intake.

Side Effects: Specific side effect data for these forms is not yet documented in our database. In general, consult your healthcare provider regarding tolerability at higher doses.

These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before starting or changing a supplement regimen.

Dosing Guidance

Dosing information not yet available for this ingredient.

Frequently Asked Questions

What is the best form of Banaba (Lagerstroemia speciosa L.) Leaf Extract?
Banaba (Lagerstroemia speciosa L.) Leaf Extract (1% Corosolic Acid) is the T1 Preferred form of Banaba (Lagerstroemia speciosa L.) Leaf Extract in the FormulaForge formulary, reflecting research-backed evidence for superior bioavailability (good (S2)). This classification is based on published absorption studies and clinical evidence quality. The best form for you depends on your individual health goals and your healthcare provider's recommendations. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
How much Banaba (Lagerstroemia speciosa L.) Leaf Extract should I take daily?
Dosing information for Banaba (Lagerstroemia speciosa L.) Leaf Extract is being compiled in our database. Individual dose requirements vary based on health goals and existing nutrient intake. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What are the benefits of Banaba (Lagerstroemia speciosa L.) Leaf Extract?
Banaba (Lagerstroemia speciosa L.) Leaf Extract has been studied for its role in supporting: Supports healthy blood sugar metabolism already within normal range, Supports insulin sensitivity and glucose uptake, Supports healthy body composition, Supports antioxidant defense. Banaba leaf extract (Lagerstroemia speciosa) contains corosolic acid, a pentacyclic triterpene that supports glucose transporter (GLUT4) activation. Research demonstrates its ability to support healthy post-meal blood sugar responses. The extract provides a botanical approach to metabolic health support. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
When is the best time to take Banaba (Lagerstroemia speciosa L.) Leaf Extract?
Optimal timing for Banaba (Lagerstroemia speciosa L.) Leaf Extract supplementation depends on the specific form, dosage, and individual factors. Some forms may be better absorbed with food; others may not require food. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
Are there side effects of taking Banaba (Lagerstroemia speciosa L.) Leaf Extract?
Tolerability of this Specialty supplement varies by individual, dose, and specific form. Some individuals may experience gastrointestinal discomfort at higher doses. Specific side effect profiles for each form of Banaba (Lagerstroemia speciosa L.) Leaf Extract are documented in our formulary where available. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What forms of Banaba (Lagerstroemia speciosa L.) Leaf Extract are available?
There are 1 form of Banaba (Lagerstroemia speciosa L.) Leaf Extract in our formulary: Banaba (Lagerstroemia speciosa L.) Leaf Extract (1% Corosolic Acid) (T1 Preferred, bioavailability: good (S2)). Forms differ in chemical structure, bioavailability, and typical dose range. FormulaForge classifies forms by tier based on published bioavailability evidence.

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FormulaForge formulates and sells supplements containing the ingredients discussed on this page. Our formulary recommendations are based on peer-reviewed bioavailability research. All cited studies are independently verifiable.