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The GRoceries Aimed at Increasing Nutrition (GRAIN) Study for Type 2 Diabetes and Prediabetes

This study, called GRAIN, is looking at ways to help people with prediabetes or type 2 diabetes eat more whole grains. Only a small percentage of Americans eat enough whole grains, which are linked to a lower risk of type 2 diabetes. The study will test if special marketing messages, either alone or with financial incentives that change based on your purchases, can encourage you to buy whole grain products when you shop for groceries online. Researchers will measure the change in calories purchased from whole grain products over 18 weeks to see if these strategies are successful. This study is for people aged 45-70 who live in certain Pennsylvania counties, don't eat many whole grains, and shop for groceries online.

Study design
This is an interventional study with 216 planned participants. It will compare two different approaches to encouraging whole grain purchases.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
The primary endpoint is measured at 18 weeks, indicating a follow-up period of at least that duration.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07167004

The GRoceries Aimed at Increasing Nutrition Study

Recruiting
NAAges 45–70InterventionalPrevention
University of Pennsylvania
~216 participants
Updated 2026-08-06 on ClinicalTrials.gov
What's tested:Marketing Nudges OnlyMarketing Nudges + Dynamically Adapted Financial Incentives

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Change in calories purchased from products that are majority whole grains over time
Measured over 18 weeks

Conditions

Type 2 Diabetes
Type II Diabetes Mellitus
Type II Diabetes
Pre-diabetes
Pre-diabetic
Pre-diabetic State
Type 2 Diabetes Mellitus (T2DM)
Type 2 Diabetes Mellitus
Type 2 Diabetes (T2DM)

Explore related trials

PrediabetesType 2 Diabetes Mellitus

Where it's being run

1 sites across 1 states
Pennsylvania1

Study leadership

  • Sophia V Hua, PhD, MPH · PRINCIPAL_INVESTIGATOR · Department of Medical Ethics and Health Policy, Perelman School of Medicine

Who to contact

Emily Dzieniszewski, MPH
[email protected]
215-898-0954
Email the study team

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Do you actually qualify for this trial?

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Eligibility criteria

Inclusion

Age 45 - 70 years.
Able to provide consent.
Resident of Philadelphia, Bucks, Delaware, Chester, or Montgomery Counties in Pennsylvania.
Consume \<5 servings of whole grains per day.
Use online grocery shopping at least once per month.
Have access to a credit or debit card to pay for groceries purchased.
Have reliable internet access.
Speak English.
Penn Medicine patient diagnosed with prediabetes or diabetes (identified using ICD-10 codes R73.03, E11).
Not able to speak English.
Not able to provide consent.

What this trial measures

  • Change in calories purchased from products that are majority whole grains over time18 weeks

    The study team will use random-effects linear regression models to compare within-subject changes in the calories purchased from whole grains, adjusting for repeated measures, to examine trends over time.