RCT of a Polyherbal Dietary Supplement for Prediabetes
The primary purpose of this study is to evaluate the impact of a polyherbal dietary supplement (Designs for Health - GlucoSupreme™ Herbal) on markers of glycemic control and other structure/function outcomes among a sample of prediabetic adults. A 12-week randomized, double-blinded, placebo-controlled clinical trial will be conducted to achieve the purpose of this study. The research team hypothesizes that GlucoSupreme™ Herbal will improve a variety of validated markers of glycemic control that are commonly used in clinical practice more effectively than placebo.
- Prediabetic State
- Eligible Ages
- Over 18 Years
- Eligible Genders
- Accepts Healthy Volunteers
- Age ≥ 18 years
- Prediabetic blood measurement (HbA1C) of 5.7-6.4% and/or fasting blood glucose of 100-125 mg/dl and/or 2-hour Oral Glucose Tolerance Test blood glucose value of 140 mg/dl-199 mg/dl1 2) taken within the last 12 weeks
- Agree to continue with current diet and refrain from taking any new nutritional or herbal supplements
- Able to understand and write English
- Voluntarily consent to the study and understand its nature and purpose including potential risks and side effects
- Current daily use of any oral hypoglycemic medication or insulin injection
- Current daily use of any supplement containing the herbs in the study supplement
- Known allergies to any substance in the study supplement
- Current daily tobacco smoker
- Currently pregnant or planning to become pregnant in the next 12 weeks
- Any current or previous diagnosis of diabetes (Type 1 or Type 2)
- Myocardial infarction, vascular surgery, or stroke in the past year
- Study Type
- Intervention Model
- Parallel Assignment
- Intervention Model Description
- This study is a 12-week, randomized, double-blinded, placebo-controlled clinical trial of GlucoSupreme™ Herbal. Eligible participants will be recruited from within participating clinical practices. All study outcomes will be biomarkers, capturing normal structure and function of the human body, derived from blood draws ordered during two physician visits spaced 12 weeks apart. This is a typical interval between blood assessments of glycemic control in routine clinical practice. An IRB-approved research associate will call each study participant at the 6-week mid-point of the study to assess compliance and collect data on any adverse events. Serious adverse events, while not anticipated, will be reported by the participant to a study physician as soon as possible.
- Primary Purpose
- Double (Participant, Care Provider)
- Masking Description
- The study products will be delivered to the investigative sites prior to enrollment of subjects. A study code will be provided for every batch of study product shipped to the investigational site prior to the beginning of the study. The placebo utilized in this clinical trial will be formulated to be as similar as possible to the active in appearance, odor, and other key characteristics, and packaging for both intervention and placebo will be the same. The de-identified study product will be packaged and labeled according to the study code and participant identification numbers; the Study Coordinator will oversee a locked master list of these, in addition to batch numbers.
|Each daily serving of four GlucoSupreme™ Herbal tablets includes extracts from: cinnamon bark (Cinnamomum cassia) 500 mg, banaba leaf (Lagerstroemia speciosa standardized to 1% corosolic acid) 200 mg, kudzu root (Pueraria lobata standardized to 40% isoflavones) 200 mg, fenugreek seed (Trigonella foenum-graceum standardized to contain 60% saponins) 200 mg, and gymnema leaf (Gymnema sylvestre standardized to contain 25% gymnemic acid). Additionally, American ginseng root (Panax quinquefolius standardized to contain 5% ginsenosides) 200 mg, and berberine HCl derived from bark (Berberis aristata) 500 mg. Other ingredients include Cellulose (capsule), microcrystalline cellulose, silicon dioxide, and vegetable stearate.||
|The placebo utilized in this clinical trial will be formulated by the manufacturer to be as similar as possible to the active intervention in appearance, odor, and other key characteristics. Packaging for the control will be identical to packaging for the Active Comparator.||
- NCT ID
- University of Maryland, Baltimore
Study ContactMary Bahr-Robertson
Prediabetes is a common state in which blood glucose levels are elevated, but are not elevated high enough to be considered Type 2 Diabetes (T2D). The worldwide prevalence of prediabetes is high and rapidly increasing. People with prediabetes are at increased risk for developing a variety of chronic diseases. Most notably, prediabetes nearly always precedes diagnosis of T2D, a poorly-controlled disease adversely affecting 14% of adults in the United States. T2D is responsible for increased risk of heart disease, stroke, blindness and other vision problems, kidney disease, amputations and death. Prediabetes often progresses to T2D relatively quickly, as pancreatic beta-cell dysfunction perpetuates. There are currently limited pharmacological options available for safely reducing the burden of prediabetes. Furthermore, these pharmacological options often carry potentially deleterious side effects. Low-risk alternatives are needed where lifestyle modifications, such as increased physical activity and weight loss, have failed.
Herbal dietary supplements have shown promise in safely managing impaired glycemic control in prediabetic adults in many clinical studies. A wide variety of herbs have been previously studied for these purposes, including cinnamon, fenugreek, banaba, curcumin, and a variety of combination products. Of these, most have demonstrated improved management of glycemic control, particularly with regard to reducing fasting blood glucose and postprandial glucose, HbA1c, fasting insulin levels, HOMA-Insulin Resistance, and increasing HOMA-β cell function among prediabetic adult populations. Many herbs have also demonstrated benefit in the management of glycemic control in clinical trials among T2D populations. These herbs include berberine, ginseng, gymnema, banaba, cinnamon, fenugreek, and kudzu, all of which are present in GlucoSupreme™ Herbal.
The research team hypothesizes that GlucoSupreme™ Herbal will demonstrate superior improvements in markers of glycemic control than placebo over twelve weeks of daily supplementation among a sample of healthy adults. The research team aims to conduct a randomized, placebo-controlled, double-blinded clinical trial to evaluate this hypothesis among a diverse sample of 40 prediabetic adults, and will implement a 1:1 study allocation ratio. This study will utilize an adaptive sample size re-estimation (SSR) approach where participant enrollment may be extended beyond the originally planned sample size if interim effect size is smaller than anticipated, but still promising, thereby preserving study power; this will be determined by examination of available unblinded endpoint data by an independent statistician after 30 subjects are enrolled.