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MedDiet-SN vs MedDiet-WL: Improving Weight Management and Lifestyle in Older Adults with Obesity

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Study Aim

This study aims to compare the Mediterranean Diet with snacks (MedDiet-SN) versus the Mediterranean Diet with weight loss (MedDiet-WL) in improving physical activity, body fat, dietary intake, and adherence to the Mediterranean Diet in older adults with obesity.

What is being tested

Social Network Learning Program

+ Social Network Learning Program

Behavioral
Who is being recruted

Body Weight+5

+ Nutrition Disorders

+ Nutritional and Metabolic Diseases

From 50 to 79 Years
+12 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Treatment Study

Interventional
Study Start: February 2026
See protocol details

Summary

Principal SponsorUniversity of Illinois at Chicago
Study ContactLara Blumstein, MAMore contacts
Last updated: September 1, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: February 1, 2026

Actual date on which the first participant was enrolled.

This study focuses on weight management in older adults with obesity, specifically those aged 50-79 years with a BMI of 30-50 kg/m². The main goal is to compare two dietary approaches: the Mediterranean Diet for Weight Loss (MedDiet-WL) and the Mediterranean Diet for Social Networks (MedDiet-SN). The study aims to see if participants in the MedDiet-SN group show greater improvements in bodyweight, BMI, body fat, diet quality, and physical activity compared to those in the MedDiet-WL group. The study also explores how these improvements are maintained over a year and how information about weight management is shared among participants' social networks. During the 6-month study, participants will attend 24 sessions. Their physical activity will be measured using the Godin-Shephard Leisure Time Physical Activity Questionnaire. Body fat and BMI will be assessed using a stadiometer and scale. Dietary intake will be evaluated with the Vioscreen Food Frequency Questionnaire, and adherence to the Mediterranean Diet will be measured using the Mediterranean Eating Patterns for Americans (MEPA) screener. The study also compares how participants share weight management information within their social networks and how these networks may influence the outcomes.

NCT07798557
Principal SponsorUniversity of Illinois at Chicago
Study ContactLara Blumstein, MAMore contacts
Last updated: September 1, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

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

532 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 50 to 79 Years

Range of ages for which participants are eligible to join.

Healthy volunteers allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Body WeightNutrition DisordersNutritional and Metabolic DiseasesSigns and SymptomsPathological Conditions, Signs and SymptomsOvernutritionObesityOverweight

Criteria

7 inclusion criteria required to participate
50-79 yrs old
BMI 30-50
Have access to a phone
Plan to reside in the Chicago area for the next 12 months
Show More Criteria
5 exclusion criteria prevent from participating
Bariatric surgery
Cancer treatment within the past 12 months
Current adherence to MedDiet based on dietary screening
Severe ischemic heart disease
Show More Criteria

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

2 intervention groups are designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Active Comparator
Participants in this group follow a Mediterranean diet plan for weight loss. They also receive a social network curriculum to help share lifestyle change information with others.

Group II

Active Comparator
This group follows a Mediterranean Diet for weight loss and participates in a social network curriculum. The curriculum empowers participants to share lifestyle change information within their social networks.

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Recruiting

University of Illinois Chicago

Chicago, United StatesOpen University of Illinois Chicago in Google Maps
Recruiting
One Study Center