NCT01053793

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.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
10

participants targeted

Target at below P25 for not_applicable diabetes

Timeline
Completed

Started Jan 2010

Shorter than P25 for not_applicable diabetes

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

January 1, 2010

Completed
19 days until next milestone

First Submitted

Initial submission to the registry

January 20, 2010

Completed
1 day until next milestone

First Posted

Study publicly available on registry

January 21, 2010

Completed
11 days until next milestone

Primary Completion

Last participant's last visit for primary outcome

February 1, 2010

Completed
28 days until next milestone

Study Completion

Last participant's last visit for all outcomes

March 1, 2010

Completed
Last Updated

January 17, 2011

Status Verified

January 1, 2011

Enrollment Period

1 month

First QC Date

January 20, 2010

Last Update Submit

January 14, 2011

Conditions

DiabetesInsulin Resistance

Keywords

Glycemic indexAnthocyaninPotatoPolyphenol

Outcome Measures

Primary Outcomes (1)

  • Glycemic response

    2 hrs

Secondary Outcomes (1)

  • Bioavailability of polyphenols from potatoes

    4 hours

Study Arms (2)

Glucose Standard

ACTIVE COMPARATOR
Other: Glycemic response to different varieties of potatoes

Potato Variety

EXPERIMENTAL
Other: Glycemic response to different varieties of potatoes

Interventions

Glycemic response to different varieties of potatoesOTHER

the glycemic response top 50g available carbohydrates from 4 potato varieties will be compared to a 50g glucose standard

Also known as: Purple potato, Red potato, White potato, Yellow potaot
Glucose StandardPotato Variety

Eligibility Criteria

Age18 Years - 50 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • healthy, non-smoker on no medication
  • normal glucose tolerance
  • willing to have a catheter inserted in forearm

You may not qualify if:

  • abnormal glucose tolerance
  • abnormal BMI
  • on medication for a chronic disorder

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Nutrasource Diagnostic Inc

Guelph, Ontario, N1G 0B4, Canada

Location

Related Publications (4)

  • Wolever TM, Brand-Miller JC, Abernethy J, Astrup A, Atkinson F, Axelsen M, Bjorck I, Brighenti F, Brown R, Brynes A, Casiraghi MC, Cazaubiel M, Dahlqvist L, Delport E, Denyer GS, Erba D, Frost G, Granfeldt Y, Hampton S, Hart VA, Hatonen KA, Henry CJ, Hertzler S, Hull S, Jerling J, Johnston KL, Lightowler H, Mann N, Morgan L, Panlasigui LN, Pelkman C, Perry T, Pfeiffer AF, Pieters M, Ramdath DD, Ramsingh RT, Robert SD, Robinson C, Sarkkinen E, Scazzina F, Sison DC, Sloth B, Staniforth J, Tapola N, Valsta LM, Verkooijen I, Weickert MO, Weseler AR, Wilkie P, Zhang J. Measuring the glycemic index of foods: interlaboratory study. Am J Clin Nutr. 2008 Jan;87(1):247S-257S. doi: 10.1093/ajcn/87.1.247S.

    PMID: 18175765BACKGROUND

  • Ramdath DD, Isaacs RL, Teelucksingh S, Wolever TM. Glycaemic index of selected staples commonly eaten in the Caribbean and the effects of boiling v. crushing. Br J Nutr. 2004 Jun;91(6):971-7. doi: 10.1079/bjn20041125.

    PMID: 15182400BACKGROUND

  • Wolever TM, Vorster HH, Bjorck I, Brand-Miller J, Brighenti F, Mann JI, Ramdath DD, Granfeldt Y, Holt S, Perry TL, Venter C, Xiaomei Wu. Determination of the glycaemic index of foods: interlaboratory study. Eur J Clin Nutr. 2003 Mar;57(3):475-82. doi: 10.1038/sj.ejcn.1601551.

    PMID: 12627186BACKGROUND

  • Wolever TM, Isaacs RL, Ramdath DD. Lower diet glycaemic index in African than South Asian men in Trinidad and Tobago. Int J Food Sci Nutr. 2002 Jul;53(4):297-303. doi: 10.1080/09637480220138142.

    PMID: 12090025BACKGROUND

MeSH Terms

Conditions

Diabetes MellitusInsulin Resistance

Condition Hierarchy (Ancestors)

Glucose Metabolism DisordersMetabolic DiseasesNutritional and Metabolic DiseasesEndocrine System DiseasesHyperinsulinism

Study Officials

  • Dan Ramdath, PhD

    Agriculture and Agri-Food Canada

    PRINCIPAL INVESTIGATOR

  • Maggie Laidlaw, PhD

    Nutracource Diagnostics Inc

    STUDY DIRECTOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
NONE
Purpose
BASIC SCIENCE
Intervention Model
SINGLE GROUP
Sponsor Type
OTHER GOV

Study Record Dates

First Submitted

January 20, 2010

First Posted

January 21, 2010

Study Start

January 1, 2010

Primary Completion

February 1, 2010

Study Completion

March 1, 2010

Last Updated

January 17, 2011

Record last verified: 2011-01

Locations

CA(1)