Glycemic Index and Polyphenol Bioavailability of Potatoes
- Conditions
- DiabetesInsulin Resistance
- Interventions
- Other: Glycemic response to different varieties of potatoes
- Registration Number
- NCT01053793
- Lead Sponsor
- Guelph Food Research Centre
- Brief Summary
The purpose of this study is to determine the glycemic index of four varieties of potatoes and to determine the bioavailability of polyphenols contained in these potatoes.
- Detailed Description
Ten healthy persons will have a fasting blood sample drawn and asked to randomly consume a 50g glucose drink (2 occasions), or 50g carbohydrate equivalent of cooked purple, red, yellow and white potatoes. Further blood samples will be obtained at 15,30, 45, 60, 90, 120, 180, 240 mins. Bloods from the first 2 hours will be analyzed for glucose and insulin to determine the glycemic response. Hourly blood samples will be analyzed for polyphenol to determine the bioavailability of polyphenols from the different potato variety. Urine samples will be collected before ingestion of the food items and again at 4 hours, and will be used to determine polyphenol bioavailability.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 10
- healthy, non-smoker on no medication
- normal glucose tolerance
- willing to have a catheter inserted in forearm
- abnormal glucose tolerance
- abnormal BMI
- on medication for a chronic disorder
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Potato Variety Glycemic response to different varieties of potatoes - Glucose Standard Glycemic response to different varieties of potatoes -
- Primary Outcome Measures
Name Time Method Glycemic response 2 hrs
- Secondary Outcome Measures
Name Time Method Bioavailability of polyphenols from potatoes 4 hours
Trial Locations
- Locations (1)
Nutrasource Diagnostic Inc
🇨🇦Guelph, Ontario, Canada