The Effects of Specialty Coffee on Cognitive Function in People With Type 2 Diabetes

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

UNKNOWN

Clinical Phase

NA

Total Enrollment

70 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-01-01

Study Completion Date

2025-01-01

Brief Summary

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Coffee has been found to have beneficial effects on cognitive function and blood sugar control. Benefits include reduced risk of cognitive decline and improved performance on cognitive tests, as well as reduced risk of diabetes and improved blood sugar control in people with diabetes, a population that is at a higher risk of cognitive decline. These effects have been observed for both caffeinated and decaffeinated coffee, and have been associated with the polyphenol chlorogenic acid (CGA). This polyphenol has been found to be more bioavailable in certain coffees, known as "speciality coffee" as defined by the Specialty Coffee Association of America, depending on agriculture, roasting, and brewing method.

This current project will bring together these previous findings to explore the effects of specialty coffee on cognitive function and glycaemic control in people with type 2 diabetes through a randomized control trial with two groups: a high CGA specialty coffee group and a conventional coffee control group. Participants will be quasi-randomly assigned to one of these two groups following the completion of a 4-week run-in period during which participants will consume conventional coffee only. The length of the experimental arms is 8 weeks, therefore the total length of the study is 12 weeks. At the beginning and the end of each experimental arm participants will undertake a cognitive assessment online using the Gorilla platform, and a series of questionnaires relating to health and mood measures (details in procedure). Cognitive function will also be assessed at the beginning of the 4-week run-in period.

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Detailed Description

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Conditions

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Type 2 Diabetes

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

SINGLE

Participants

Study Groups

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Conventional coffee

Participants will be provided with a conventional, low CGA coffee to brew and consume which contains less CGA than the experimental arm.

Group Type ACTIVE_COMPARATOR

Coffee

Intervention Type OTHER

24 ounces of coffee will be consumed daily

CGA-rich coffee (Speciality coffee)

Participants will be provided with a single origin, CGA-rich specialty coffee as graded by the Specialty Coffee Association of America's Q-grading system to brew and consume

Group Type EXPERIMENTAL

Coffee

Intervention Type OTHER

24 ounces of coffee will be consumed daily

Interventions

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Coffee

24 ounces of coffee will be consumed daily

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Age 55-70 years
* Formal diagnosis of Type 2 Diabetes for 3 years or more
* Current coffee drinkers, 4 or fewer cups daily (a cup is 8 oz)

Exclusion Criteria

* Insulin-dependent
* Consuming on average more than 4 cups of coffee daily
* Regularly consuming specialty coffee (participants will be provided with a list of these coffees)

Minimum Eligible Age

55 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No