Completed

CinnamonCinnamon Trial-Assessment of the effeCt of lIfestyle iNtervention Plus Water-soluble ciNnAMon Extract On loweriNg Blood Glucose in Pre-diabetics: A Randomized, Double-blind, Multicenter, Placebo Controlled TRIAL.

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What is being tested

water-soluble cinnamon extract (Cinnulin PF)

Drug
Who is being recruted

Diabetes Mellitus+4

+ Endocrine System Diseases

+ Hyperglycemia

Over 18 Years
See all eligibility criteria
How is the trial designed

Prevention Study

Placebo-Controlled
Interventional
Study Start: June 2013
See protocol details

Summary

Principal SponsorMike O'Callaghan Military Hospital
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: June 11, 2013

Actual date on which the first participant was enrolled.

We are studying whether water-soluble cinnamon extract (Cinnulin PF) plus standard of care aggressive lifestyle therapy is effective in lowering blood glucose when compared to placebo plus standard of care aggressive life style therapy. Eligible subjects will be recruited from any form and any stage of "standard" lifestyle intervention for pre-diabetes at an individual base. "Standard" lifestyle intervention for pre-diabetes could include Group Lifestyle Balance (GLB), nutrition classes, Better Body/Better Life, or anything an investigator certifies as standard practice at that base. Subjects will take either 1 gram (2-500 milligram (mg) capsules) of water-soluble cinnamon extract (Cinnulin PF) or 2 placebo pills (gelatin capsule filled with wheat bran) once a day for 1 year plus 1 additional year of follow-up. This is a randomized, double-blind, multicenter, placebo-controlled study which will enroll subjects at the Mike O'Callaghan Federal Medical Center (MOFMC), Wilford Hall Ambulatory Surgical Center (WHASC), David Grant Medical Center (DGMC), Eglin Air Force Base (Eglin), and Offutt Air Force Base (Offutt). All subjects will be MOFMC, WHASC, DGMC, Eglin, and Offutt DoD beneficiaries. Informed Consent and HIPAA Authorization will be obtained. After randomization, subjects will receive either 1 gram (2-500 mg capsules) of water-soluble cinnamon extract or placebo from the pharmacy--thus investigators and subjects will be blinded as to if they are taking Cinnulin PF or 2 placebo pills. Subjects will be permitted to have usual medical care for other co-morbid, preventive, and acute conditions. Analysis will be performed using intention-to-treat principles for missing data (the carry-forward method to impute missing data will be used). Subjects will bring in any remaining water-soluble cinnamon extract or placebo to determine adherence rates to the study protocol.

Official TitleCinnamon Trial-Assessment of the effeCt of lIfestyle iNtervention Plus Water-soluble ciNnAMon Extract On loweriNg Blood Glucose in Pre-diabetics: A Randomized, Double-blind, Multicenter, Placebo Controlled TRIAL.
NCT01301521
Principal SponsorMike O'Callaghan Military Hospital
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

229 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Prevention Study

Prevention studies aim to stop a disease from developing. They often involve people at risk and test things like vaccines, lifestyle changes, or preventive medications.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

Over 18 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Diabetes MellitusEndocrine System DiseasesHyperglycemiaMetabolic DiseasesNutritional and Metabolic DiseasesGlucose IntoleranceGlucose Metabolism Disorders

Criteria

THIS STUDY IS BEING CONDUCTED AT A MILITARY INSTALLATION. YOU MUST HAVE MILITARY INSURANCE IN ORDER TO PARTICIPATE IN THIS STUDY. Inclusion: Patients will be MOFMC, WHASC, DGMC, Eglin, and Offutt DoD beneficiaries, ages 18-65 years. Diagnosis of pre-diabetes (defined as a fasting plasma glucose (FPG) 100-125mg/dl, Hemoglobin A1c 5.7-6.4%, or a 2-hour oral glucose tolerance test (OGTT) 140-199). Exclusion: Patients who are less than 18 yrs of age or greater than 65 years of age. Patients who are known to have or develop during the study any of the following upon review of their medical record: * Diabetes Mellitus (defined as fasting plasma glucose (FPG) greater than 126mg/dl, hemoglobin A1C greater than 6.5%, or a 2-hour oral glucose tolerance test (OGTT) greater than 200mg/dl) * Stage 3 kidney disease or worse * Renal insufficiency defined as a glomerular filtration rate (gfr) of less than 60ml * Celiac disease * Insulinoma * Cushing's disease * Hyperthyroidism * Acromegaly * Pheochromocytoma * Addison's disease * Galactosemia * Glycogen storage disease * Hereditary fructose intolerance Patients taking any of the following: * Cinnamon as a dietary supplement * Daily oral steroids * Warfarin * Hypoglycemic medication * Weight loss medication * Digoxin, lithium, phenytoin, \& theophylline (due to their narrow therapeutic indices) Patients who are pregnant or breast feeding Patients with a known allergy to cinnamon Patients with a known allergy to wheat

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

2 intervention groups are designated in this study

50% chance of being blinded to the placebo group

Treatment Groups

Group I

Experimental
Will take (by mouth) 2 gelatin capsules that contains 1 gram (2-500 mg capsules) water-soluble cinnamon extract (Cinnulin PF) once a day for 1 year plus 1 year of follow-up plus standard of care aggressive lifestyle therapy.

Group II

Placebo
Will take (by mouth) 2 placebo capsules (gelatin capsule filled with wheat bran) once a day for 1 year plus 1 year of follow-up plus standard of care aggressive lifestyle therapy.

Study Objectives

Primary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 4 locations

Suspended

Travis Air Force Base

Travis Air Force Base, United StatesOpen Travis Air Force Base in Google Maps
Suspended

Eglin Air Foce Base

Eglin Air Force Base, United States
Suspended

Offutt Air Force Base

Offutt Air Force Base, United States
Suspended

Wilford Hall Ambulatory Surgical Center

Lackland Air Force Base, United States
Completed4 Study Centers