Banaba Leaf Extract

Dr. Sarah Mitchell
By Dr. Sarah Mitchell
Sep 23, 2026
1 min read

Lagerstroemia speciosa

Also known as: Banaba, Pride of India, Queen's Crape Myrtle

Banaba Leaf Extract is a botanical supplement rich in corosolic acid that supports healthy blood glucose balance, insulin sensitivity, and antioxidant defenses.

Banaba Leaf Extract

Learn about Banaba Leaf Extract benefits and side effects, recommended dosage, active corosolic acid compounds, and safety guidelines.

Banaba Leaf Extract comes from the leaves of Lagerstroemia speciosa, a botanical tree native to tropical regions of Southeast Asia. Historically utilized in traditional herbal practices, this botanical extract has gained widespread popularity as a dietary supplement for maintaining metabolic health. The key active constituent in banaba leaves is corosolic acid, along with various ellagitannins, which contribute to its therapeutic properties.

People frequently turn to Banaba Leaf Extract supplements to support healthy blood glucose levels already within a normal range and to promote optimal insulin sensitivity. Additionally, the extract offers antioxidant support that helps neutralize free radicals in the body. Because banaba may influence blood sugar balance, individuals taking blood glucose medications or managing underlying health conditions should consult a qualified healthcare professional before beginning supplementation.

Banaba Leaf Extract Quick Overview

Scientific Name
Lagerstroemia speciosa
Category
Herbs & Botanicals
Key Compound
Corosolic acid
Used For
Blood Sugar Support, Insulin Sensitivity, Metabolic Health, Antioxidant Protection
Available Forms
Standardized Oral Capsules, Tablets, Liquid Extract, Herbal Tea
Research Dosage
A common dosage for Banaba Leaf Extract standardized to 1% corosolic acid is 32 to 48 mg daily, typically taken before meals.
Where It's Found
Leaves of the Lagerstroemia speciosa tree native to Southeast Asia

Common Forms and Standard Dosage

Standardized Oral Capsules
Tablets
Liquid Extract
Herbal Tea

FORM TYPICAL DOSAGE RANGE
Standardized Capsules (1% Corosolic Acid) 32–48 mg daily
Standardized Capsules (18% Corosolic Acid) 10–12 mg daily
Tablets 32–50 mg daily
Herbal Tea 1–2 cups daily

Key Health Benefits of Banaba Leaf Extract

Banaba Leaf Extract

  • Supports healthy blood glucose levels already within normal range
  • Promotes improved insulin sensitivity and cellular glucose uptake
  • Provides antioxidant protection against cellular oxidative stress
  • Supports overall cardiovascular and metabolic health
  • Assists in healthy weight management efforts alongside proper diet

Frequently Asked Questions

Banaba Leaf Extract is derived from the leaves of the Lagerstroemia speciosa tree. It contains active compounds such as corosolic acid and ellagitannins that help facilitate cellular glucose uptake and support normal insulin action in the body.

The primary benefits of Banaba Leaf Extract include supporting healthy blood sugar levels, enhancing insulin sensitivity, and providing antioxidant support. Side effects are generally mild but may include hypoglycemia if combined with diabetes medications, as well as occasional light headache or stomach upset.

The typical Banaba Leaf Extract dosage depends on the concentration of corosolic acid. For extracts standardized to 1% corosolic acid, standard daily doses range from 32 to 48 mg. For higher concentrations, such as 18% corosolic acid, dosages are typically around 10 to 12 mg per day.

Banaba Leaf Extract safety is well established for most healthy adults when taken at recommended dosages. However, individuals taking prescription blood glucose-lowering medications or insulin should consult a doctor before use to prevent blood sugar levels from dropping too low.

By supporting efficient glucose processing and insulin sensitivity, Banaba Leaf Extract may help maintain healthy metabolic function. When paired with a balanced diet and regular physical activity, it can be a supportive addition to a weight management regimen.