The Effect of the Glycemic Load of Meals on the Cognition and Mood of Older Adults

NCT ID: NCT01842022

Last Updated: 2014-12-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

155 participants

Study Classification

INTERVENTIONAL

Study Start Date

2011-09-30

Study Completion Date

2013-09-30

Brief Summary

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A lower rather than a higher glycemic load (GL) meal has been shown to benefit cognition and mood, however, the data in older adults and those most prone to cognitive dysfunction, is limited and conflicting. One explanation is that the GL of a meal may interact with a person's pre-existing glucose tolerance (GT).

As older adults have a higher incidence of glucose tolerance and are more likely to experience memory problems the present study considers the interaction between the GL of meal in those with better or poorer GT.

The population studied will not have a history of diabetes or dementia. A battery of cognitive tests will be administered after meals sweetened with one of three sugars known to vary in the rate that they release glucose into the blood stream.

Detailed Description

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On day one subjects will take an oral glucose tolerance test and will then be divided into four groups depending on their glucose tolerance (how long values remain raised) and the tendency for values to subsequently fall to low values.

On a second occasion 155 healthy older adults, aged 45-80 years, will be randomly assigned to receive either a glucose, sucrose or isomaltulose based meal. All meals are matched on macronutrient composition and differ only in glycemic load. Cognitive performance and mood will be assessed 30, 105 and 180 minutes after breakfast. Measures of memory, attention, reaction times and mood will be taken.

The response to the three meals will be contrasted in those with different glucose profiles on day one

Conditions

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Dementia

Keywords

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Glycemic load memory mood

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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Better glucose tolerance

Take meals with isomaltulose, sucrose or glucose

Group Type OTHER

Isomaltulose

Intervention Type DIETARY_SUPPLEMENT

Isomaltulose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Sucrose

Intervention Type DIETARY_SUPPLEMENT

Sucrose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Glucose

Intervention Type DIETARY_SUPPLEMENT

Glucose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Better glucose tolerance / Levels fall

Take meals with isomaltulose, sucrose or glucose

Group Type OTHER

Isomaltulose

Intervention Type DIETARY_SUPPLEMENT

Isomaltulose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Sucrose

Intervention Type DIETARY_SUPPLEMENT

Sucrose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Glucose

Intervention Type DIETARY_SUPPLEMENT

Glucose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Poorer tolerance levels remain high

Take meals with isomaltulose, sucrose or glucose

Group Type OTHER

Isomaltulose

Intervention Type DIETARY_SUPPLEMENT

Isomaltulose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Sucrose

Intervention Type DIETARY_SUPPLEMENT

Sucrose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Glucose

Intervention Type DIETARY_SUPPLEMENT

Glucose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Poorer glucose tolerance / Levels fall

Take meals with isomaltulose, sucrose or glucose

Group Type OTHER

Isomaltulose

Intervention Type DIETARY_SUPPLEMENT

Isomaltulose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Sucrose

Intervention Type DIETARY_SUPPLEMENT

Sucrose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Glucose

Intervention Type DIETARY_SUPPLEMENT

Glucose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Interventions

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Isomaltulose

Isomaltulose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Intervention Type DIETARY_SUPPLEMENT

Sucrose

Sucrose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Intervention Type DIETARY_SUPPLEMENT

Glucose

Glucose sweetened meal will be given to each of four groups who differ in their glucose tolerance

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* Healthy adults of 45 to 80 years

Exclusion Criteria

* Type 1 or type 2 diabetes
* Dementia
* Liver disease
* Gastro-intestinal problems
Minimum Eligible Age

45 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Swansea University

OTHER

Sponsor Role lead

Responsible Party

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David Benton

Professor of Psychology

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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David Benton, DSc

Role: PRINCIPAL_INVESTIGATOR

Swansea University

Locations

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Psychology, Swansea University

Swansea, Wales, United Kingdom

Site Status

Countries

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United Kingdom

Other Identifiers

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DB-0413

Identifier Type: -

Identifier Source: org_study_id