NCT07229781

Mediterranean Diet and Blood Sugar Study

Glycemic Effects of a Mediterranean-Style Dietary Pattern Containing Potatoes in Adults With Prediabetes

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 74 (estimated)
• Sponsor: Penn State University · Academic / Other
• Sex: All
• Age: 25 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this research study is to determine if a healthy Mediterranean diet containing one medium potato/day has equivalent or non-different effects on risk factors for type 2 diabetes and heart disease compared to a healthy Mediterranean diet without potatoes in adults with prediabetes. Participants will be randomly assigned to one of the test diets and be asked to consume this diet for 12 weeks (84 days). Testing will be conducted at the beginning and end of the study.

Detailed description

This is a 12-week, 2-arm parallel, randomized controlled feeding trial. Participants will be randomized to either a Mediterranean-style diet that includes 1 medium potato/day/2000 kcal replacing some grains , or a traditional-style Mediterranean dietary pattern without potatoes. All food will be provided for the 12-week study duration.

Conditions

• Prediabetes

Interventions

Type	Name	Description
OTHER	Mediterranean-style diet with potatoes	The diet will contain 1 medium potato/day/2000 kcal
OTHER	Traditional-style Mediterranean diet	Traditional-style Mediterranean diet higher in grains

Timeline

• Start date: 2026-06-01
• Primary completion: 2028-04-30
• Completion: 2028-04-30
• First posted: 2025-11-17
• Last updated: 2026-04-02