Enriched Eggs for Retina Health in Type 2 Diabetes

November 1, 2023 updated by: University of Manitoba

Effects of DHA and Lutein Enriched Eggs on Retina Health and Metabolic and Physical Parameters in Type 2 Diabetes: a Strategy for Diabetic Retinopathy

Diabetes mellitus has been declared a major public health issue. Among the complications of the disease, retinopathy can have a significant impact on mobility and quality of life for individuals living with diabetes. As the leading cause of new blindness in adults, diabetic retinopathy has been shown to affect 23% of all Type 1 and 14% of Type 2 diabetic individuals. Various studies have reported that a number of components in the egg may contribute to visual function and eye health. Specifically, i) egg yolk naturally contains, and can be further enriched with the carotenoids lutein and zeaxanthin. Lutein and zeaxanthin protect the retina against light induced retinal damage by acting as potent antioxidants that shield the retina from harmful short-wave radiation. ii) eggs can also be enriched to provide a vehicle for specific nutrients to promote eye health including omega-3 fatty acid, docosahexaenoic acid (DHA). A substantial amount of DHA is uniquely found within the retina. A DHA deficiency has shown to induce abnormal retina function indicating a constant supply of this nutrient is necessary for retina health. Currently, the American Diabetes Association declares that eggs are an excellent choice for people with diabetes, but information lacks on the status of whole egg consumption in diabetic individuals in relation to their retinal health. Therefore, the current study aims to determine if the consumption of two lutein and DHA enriched eggs per day can safely improve the retina function of individuals with type 2 diabetes.

A total of 60 adult diabetic male and female participants will be recruited to take part in this double-blinded, randomized, placebo-controlled, parallel trial. Participants will be randomly assigned to include two DHA and lutein enriched eggs or regular eggs into their usual diet for 6 weeks. At the beginning and end of the trial, a variety of measures will be analyzed including blood lipid parameters, carotenoid status, anthropometrics, arterial stiffness, advanced glycated end products, macular pigment optical density and electroretinography. These measures will aid in determining whether enriched egg consumption can safely improve retina function, while not adversely effecting body composition and cardiovascular risk factors in individuals with diabetes. The results of this study will contribute to the development of valuable prevention strategies for eye health in individuals with diabetes, thereby improving their quality of life.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
60

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Canada
    • Manitoba
      • Winnipeg, Manitoba, Canada, R2H 2A6
        • Recruiting
        • Asper Clinical Research Institute
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

19 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Adults (>19 years of age)
  • Individuals diagnosed with Type 2 diabetes
  • Individuals taking oral hypoglycemic medications (sulfonylureas, meglitinides, biguanides, thiazolidinediones etc.)
  • Individuals with a fasting plasma glucose of ≥7.0 mmol/L or glycated hemoglobin (A1C) of ≥6.5%. (these values are based on the Canadian Diabetes Association and are predictors of the development of diabetic retinopathy)

Exclusion Criteria:

  • Individuals previously diagnosed with moderate to severe diabetic retinopathy (to assess egg consumption as a preventative strategy for diabetic retinopathy).
  • Individuals with eye disease (cataracts, glaucoma, age-related macular degeneration, retinitis pigmentosa, optic atrophy, and eye malformation etc.)
  • Individuals with Alzheimer's, dementia or other mental cognitive diseases
  • Individuals with Type 1 diabetes
  • Individuals taking insulin
  • Individuals diagnosed with cancer or anemia
  • Pregnant women

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Enriched Egg Group
Participants will consume 2 medium sized docosahexaenoic acid and lutein enriched eggs daily (at least 5 days per week) for 6 weeks.
Other: Docosahexaenoic Acid and Lutein Enriched Eggs
Consumption of 2 docosahexaenoic acid and lutein enriched eggs daily (at least 5 days our week) for 6 weeks
Placebo Comparator: Regular Egg Group
Participants will consume 2 medium sized non-enriched eggs daily (at least 5 days per week) for 6 weeks.
Other: Regular Eggs
Consumption of 2 non enriched eggs daily (at least 5 days our week) for 6 weeks

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in Retina Function
Time Frame: 6 weeks
Measured by Full Field Electroretinography
6 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Manitoba

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Egg Farmers of Canada

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Miyoung Suh, RD, PhD, University of Manitoba

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 11, 2022

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 1, 2024

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 1, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 24, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 30, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 3, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 2, 2023

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 1, 2023

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • B2020:007

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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