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

Drug Des Devel Ther. 2016 Mar 29:10:1279-89. doi: 10.2147/DDDT.S97568. eCollection 2016.


Background: The aim of this paper is to evaluate the efficacy and safety of DLBS3233, a novel bioactive fraction derived from Cinnamomum burmanii and Lagerstroemia speciosa, in improving insulin resistance and preserving β-cell performance in patients with impaired glucose tolerance (IGT).

Patients and methods: Eighty adult subjects with IGT, defined as 2-hour postprandial glucose level of 140-199 mg/dL, were enrolled in this two-arm, 12-week, double-blind, randomized, placebo-controlled preliminary study. Eligible subjects were randomly allocated to receive either DLBS3233 at a dose of 50-100 mg daily or placebo for 12 weeks. The study mainly assessed the improvement of homeostatic model-assessed insulin resistance (HOMA-IR), the 15-minute and 2-hour plasma insulin levels, and the oral disposition index.

Results: After 12 weeks, DLBS3233 improved insulin resistance better than placebo as reflected by a reduced HOMA-IR (-27.04%±29.41% vs -4.90%±41.27%, P=0.013). The improvement of the first- and second-phase insulin secretion was consistently greater in DLBS3233 group than placebo group (-144.78±194.06 vs -71.21±157.19, P=0.022, and -455.03±487.56 vs -269.49±467.77, P=0.033, respectively). Further, DLBS3233 also significantly better improved oral disposition index than placebo. No serious hypoglycemia, edema, or cardiovascular-related adverse events were found in either groups.

Conclusion: This study has shown that DLBS3233 at the dose of 50-100 mg once daily was well tolerated, and promisingly efficacious in improving insulin sensitivity as well as preserving β-cell performance in subjects with IGT.

Keywords: Cinnamomum burmanii; DLBS3233; Lagerstroemia speciosa; impaired glucose tolerance; insulin resistance; β-cell function.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Cinnamomum / chemistry*
  • Dose-Response Relationship, Drug
  • Double-Blind Method
  • Female
  • Glucose Intolerance / drug therapy*
  • Humans
  • Hypoglycemic Agents / chemistry
  • Hypoglycemic Agents / isolation & purification
  • Hypoglycemic Agents / therapeutic use*
  • Insulin / metabolism*
  • Insulin Resistance
  • Lagerstroemia / chemistry*
  • Male
  • Middle Aged
  • Plant Extracts / chemistry
  • Plant Extracts / isolation & purification
  • Plant Extracts / therapeutic use*
  • Prediabetic State
  • Prospective Studies
  • Young Adult


  • DLBS3233
  • Hypoglycemic Agents
  • Insulin
  • Plant Extracts