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Banaba

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Banaba. Lagerstroemia speciosa with corosolic acid for glucose control.

How it works. Corosolic acid activates glucose uptake similar to insulin.

What the research supports. 1 graded claims. Strongest: Lowers postprandial glucose (moderate).

How much to take. Typical dose: 48 mg corosolic acid.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with A high-quality multivitamin, Omega-3 (EPA/DHA).

Common forms. Available as Standardized extract capsule, Liquid tincture (alcohol or glycerin), Powdered whole herb, Traditional decoction or tea.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Banaba. Anecdotes are not medical advice.

Banaba. Lagerstroemia speciosa with corosolic acid for glucose control.

Key compound: corosolic acidC30H48O4 · 472.7 g/mol

What it is

Lagerstroemia speciosa with corosolic acid for glucose control.

Food sources

Whole dried plant material (root, leaf, flower, or aerial parts depending on the species)Standardized hydroethanolic or aqueous extract (capsule, tincture, or tea)Powdered traditional preparation used in Ayurvedic, TCM, or Western herbal practice

How it works

Corosolic acid activates glucose uptake similar to insulin.

Pathways

  • Corosolic acid activates glucose uptake similar to insulin

Effects

  • ↓postprandial glucose decreases

What the research supports

Lowers postprandial glucosemoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
48 mg corosolic acid
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEither with or without food.
Best formMost evidence is based on the standardized extract capsule form.
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Side effects & interactions

Common side effects

  • Mild GI upset

Medication interactions

Prescription medications (general)minor

Always disclose Banaba use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
  • Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.

Common forms

  • Standardized extract capsule
  • Liquid tincture (alcohol or glycerin)
  • Powdered whole herb
  • Traditional decoction or tea

Key studies

8 studies cited in total.

PubMed: Banaba — Lowers postprandial glucose ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Banaba and "Lowers postprandial glucose". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Banaba — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Banaba and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Banaba — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Banaba and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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