Investigation of Cinnamon Spice on Glucose Tolerance in Subjects With Pre-diabetes

Summary

Participation Requirements

Description

Participants will be asked to take cinnamon spice or placebo capsules daily with breakfast and dinner (2 weeks of cinnamon, 2 weeks of placebo). The placebo capsule is a study product that looks like the cinnamon capsules, but contains no active ingredients. The amount of cinnamon will be 4 grams pe...

Participants will be asked to take cinnamon spice or placebo capsules daily with breakfast and dinner (2 weeks of cinnamon, 2 weeks of placebo). The placebo capsule is a study product that looks like the cinnamon capsules, but contains no active ingredients. The amount of cinnamon will be 4 grams per day. 2 grams will be taken at breakfast and dinner. Timed blood collections over a three-hour period will be used to measure how cinnamon spice affects glucose metabolism/insulin sensitivity in human subjects. Everyone who participates in the study will receive each treatment in random order. In this way, everyone will receive cinnamon spice capsules and placebo. In a crossover study design subjects will consume either cinnamon or placebo with foods and before bed for 28 days. The placebo capsule is a study product that looks like the cinnamon capsules, but contains no active ingredients. The participants will also be asked to undergo an oral glucose tolerance test 4 times (on separate days) before and after the first and second cinnamon/placebo consumption. Subjects will take 3 capsules of cinnamon or placebo (total 2 g) with the glucose drink (75 g). Timed blood collections over a three-hour period will be used to measure how cinnamon spice affects glucose metabolism/insulin sensitivity in human subject. Continuous glucose monitoring will performed through the entire study for each subject. The microbiome will also be examined at the beginning and end of each 28 day phase (0-4 weeks and 6-10weeks). Subjects will consume a brown-beige diet during the study to exclude the effects of other polyphenol-rich foods. We will enroll twenty subjects >= 20 years of age, overweight/obese (BMI 25 to 35 kg/ m2) with fasting blood sugar between 100 and 126 mg/dl or HbA1c >=5.7% and <= 6.5%.

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