Proprietary Botanical Blend - Dietary supplement with alpha amylase and sucrase inhibitory activity. 2 capsules

Non/minimally nutritive nonactive material: rice flour. 2 capsules

Hyperglycemia

Carbohydrate

Insulin Resistance

Malabsorption

Oral administration of capsules containing proprietary botanical blend 30 minutes prior to carbohydrate ingestion.

Proprietary Botanical Blend

Oral administration of capsules containing rice flour (placebo) 30 minutes prior to carbohydrate ingestion.

Placebo

Effect of Proprietary Botanical Blend on Glycemic Control and Post-prandial Carbohydrate Absorption

Effect of Proprietary Botanical Blend on Glycemic Control and Post-prandial Carbohydrate Absorption in Overweight, Insulin Resistant Adult Men and Women

Plasma glucose concentrations after the ingestion of a high carbohydrate meal

Measurement of hydrogen in exhaled air as an indicator of carbohydrate absorption

Plexus Worldwide

Participants will receive both treatments in random order with a washout period of at least 1 week between the 2 study visits. Women will be measured during the follicular phase of the menstrual cycle.

Treatment and placebo will be matched closely in color and appearance administered in a double blinded fashion as provided by the material supplier.

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.

Prediabetic State

This study will assess changes in glycemic parameters and other biomarkers over a twelve week period, with two blood draws (Baseline and 12 weeks). Additionally, 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.

GlucoSupreme™ Herbal

University of Maryland Center for Diabetes and Endocrinology

University of Maryland Family Medicine Associates

University of Maryland School of Medicine, Department of Family and Community Medicine, East Hall

Alliance Integrative Medicine

RCT of a Polyherbal Dietary Supplement for Prediabetes

A Randomized, Placebo-controlled Clinical Trial of a Polyherbal Dietary Supplement (GlucoSupreme™ Herbal) on Markers of Glycemic Control Among Prediabetic Adults

Elevated fasting blood glucose is one of the markers of the prediabetic state. According to American Diabetes Association criteria, the prediabetic fasting blood glucose range is 100 to 125 mg/dL (5.6 to 6.9 mmol/L). After fasting for 8-12 hours, > 0.5mL of blood will be collected from each participant, followed by centrifuge separation of plasma from cells within 45 minutes of collection. After maintaining the plasma fasting blood glucose at room temperature, it will be analyzed using standard enzymatic methodology.

Elevated HbA1c is another one of the markers of the prediabetic state and is defined as being within the range of 5.7-6.4%. A four mL sample of whole blood will be obtained from participants using techniques described above, and placed in an EDTA, lithium heparin, or sodium fluoride tube, followed by analysis using the Roche Tina Quant (Roche, Germany).

In prediabetes, pancreatic beta cells can no longer produce enough insulin to overcome insulin resistance, which can cause blood glucose levels to rise above the normal range. Thus, fasting insulin is a glycemic parameter of interest and is also used to determine insulin resistance. While normal values for fasting insulin are <25 microU/L, fasting insulin can vary widely among prediabetic individuals. After fasting for 8-12 hours, 0.8mL blood serum will be obtained from each participant. This fasting insulin assay will be performed using a 2-site electrochemiluminescent immunoassay on the Roche automated platform (Roche, Germany.).

Insulin resistance often sets the stage for progression to T2D by placing a high demand on insulin-producing beta cells during a prediabetic state. The advantage of using the validated HOMA-IR calculation is its relative simplicity and low-cost since it is derived from other primary outcomes of interest in this study. HOMA-IR is calculated as: [Fasting insulin (microU/L) x Fasting Blood Glucose (nmol/L)]/22.5.

Pancreatic beta cells (β-cells) produce insulin. Thus, their function is of interest in this prediabetic study population. As is the case with HOMA-IR, this formula utilizes values from our other study outcomes. HOMA- β is calculated as: (20 x Fasting insulin [microU/L])/(Fasting blood glucose [mmol/l] - 3.5).

The validated QUICKI measurement to assess insulin sensitivity has also been studied in herbal dietary supplement clinical trials. QUICKI is calculated as: 1/(log-fasting blood glucose [mg/dL] + log-fasting insulin [uU/mL]).

Many serum proteins are involved in glucose synthesis. Fructosamine represents the degree of glycation in these proteins, and is the concentration of plasma glucose over the lifetime of the protein. This useful test has been utilized in previous clinical studies of natural products3 4 and is an adjunct to the A1C and other fasting glycemic measurements, and reflects intermediate-term (previous 2-3 weeks) glycemic change. One mL of serum or plasma will be collected, followed by centrifuge separation within 45 minutes of collection, and analyzed using standard colorimetric assay methodology (LabCorp, Inc.).

A blood test commonly used in clinical practice to determine peak hyperglycemia. The GlycoMark test provides accurate recognition of recent glycemic deterioration or improvement (within the previous 2-4 weeks)5 6 and is commonly given adjacently to A1C (a longer-term indicator of glycemic change) in clinical practice. One mL of serum or plasma will be collected, followed by centrifuge separation within 60 minutes of collection, and analyzed using standard enzymatic colorimetric assay methodology (LabCorp, Inc.).

A standard lipid panel consisting of total cholesterol, LDL, HDL, and triglycerides will be compared at baseline and the 12-week follow up visit. One mL of serum or plasma will be collected for all lipid parameters after 8 -12 hours of fasting and in the manner as described above, followed by centrifuge separation within 45 minutes of collection, and analyzed using standard enzymatic methodology (LabCorp, Inc.).

High-sensitivity C-reactive protein (Hs-CRP) is a common measure of inflammation that is commonly collected in clinical practice. Samples will undergo analysis by latex immunoturbidimetry on a COBAS Integra 800 (Roche, Germany).

Chris D'Adamo

Director of Research Center for Integrative Medicine

University of Maryland, Baltimore

University of Maryland Center For Diabetes and Endocrinology

Miller Scientific Consulting

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.

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.

3 cups of blueberry tea per day x 4 weeks

Type 2 Diabetes

Blueberry Tea

Menzies Institute for Medical Research

Metabolic Benefits of Drinking Blueberry Tea in Type 2 Diabetes

Oral glucose tolerance test (75g glucose) measured on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design). Blood glucose and plasma insulin levels measured at 0, 15, 30, 60, 90 and 120 min following consumption of glucose load.

HbA1c levels measured on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Fasting serum lipids (cholesterol, HDL, LDL,triglycerides) measured on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Fasting serum pro-inflammatory cytokines (IL-6, IL-1b, CRP, TNFa) assessed by ELISA will be measured on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Fasting serum albumin levels measured on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Fasting serum electrolytes (Na, K, Cl, HCO3) measured on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Blood Pressure (central and brachial blood pressure) will be measured by Mobil-O-Graph and assessed on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Augmentation index will be measured by Mobil-O-Graph and assessed on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

Large artery stiffness will be measured by Mobil-O-Graph and assessed on 3 occasions: at baseline, after 4 weeks of drinking blueberry tea, and after 4 weeks of no treatment (randomized cross-over design).

cinnamon/insultas

Effect of Proprietary Botanical Blend on Glycemic Control and Post-prandial Carbohydrate Absorption

RCT of a Polyherbal Dietary Supplement for Prediabetes

Metabolic Benefits of Drinking Blueberry Tea in Type 2 Diabetes

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