Measuring the Glycemic Index of Pulse Based Breads

Glycemic Index Laboratories, Inc12 enrolled

Overview

The objective of this study is to determine the glycemic index of 4 pulse-based breads in at least 10 normal healthy human volunteers. Participants will be studied in the morning on 6 separate days after overnight fasts. On the first and last days they will consume a test meal consisting of about 2 slices of white bread (50g carbohydrate) and on the other 4 days they will consume 2-3 slices (50g carbohydrate) from 4 different test breads containing starch obtained from pulses (beans and/or lentils). Blood glucose will be measured at intervals over 2 hours. Glycemic index is calculated as 0.71 times F/WB where F is the incremental area under the curve of blood glucose (AUC) after each test bread and WB is the mean AUC after white bread.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

Conditions

Carbohydrate Intolerance

Interventions

Eligibility

Sex: ALLMin age: 18 YearsMax age: 75 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * participants in good health Exclusion Criteria: * known history of HIV * known history of diabetes * history of hepatitis within the last 3 months * heart condition requiring hospitalization within 3 months * use of medications or presence of any condition which in the opinion of the study physician, would increase the risk of harm to the subject or to others, or affect the results of the study. * participants who cannot or will not comply with experimental procedures or the safety guidelines of Glycemic Index Laboratories, Inc.

Outcomes

Primary Outcomes

Glycemic Index

Glycemic index is 0.71 times F/WB where F is the incremental area under the blood glucose response curve ignoring area below fasting (AUC) elicited by a pulse bread, and WB is the mean AUC elicited by White Bread. AUC is calculated using the trapezoid rule from 2 measures of fasting blood glucose taken 5 minutes apart (the average of these measures is taken to be fasting blood glucose) and measures of blood glucose at 15, 30, 45, 60, 90 and 120 minutes after starting to eat. The mean of the values for each pulse bread in each subject is the glycemic index.

Time frame: 120 minutes

Secondary Outcomes

Incremental area under the blood glucose response curve

Incremental area under the blood glucose response curve ignoring area below fasting (AUC) is calculated using the trapezoid rule from 2 measures of fasting blood glucose taken about 5 minutes apart (the average of these measures is taken to be fasting blood glucose) and measures of blood glucose at 15, 30, 45, 60, 90 and 120 minutes after starting to eat.

Time frame: 120 minutes

Peak blood glucose concentration (Cmax)

Cmax is the maximum of the blood glucose concentrations measured at 15, 30, 45, 60, 90 and 120 minutes after consumption of a test meal.

Time frame: 120 minutes

Peak rise of blood glucose

The maximum of the blood glucose concentrations measured at 15, 30, 45, 60, 90 and 120 minutes after consumption of a test meal minus the fasting blood glucose concentration.

Time frame: 120 minutes