PortionSize Study 2 Free-Living Evaluation

Completed

Conditions studied: Dietary Habits

In brief

The objective is to test the accuracy of the PortionSize™ app and the MyFitnessPal© app at measuring energy and nutrient intake in free-living conditions. Participants will use PortionSize™ and MyFitnessPal apps in separate periods to test the accuracy of the respective apps.

Key facts

Study ID

NCT05166226

Run by

Pennington Biomedical Research Center

People needed

45

Starts

2022-01-10

Expected to finish

2026-03-31

Last updated by the study team

2026-05-13

Who can join

Age: 18 and older, up to 62. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Male or female, age 18-62 years
• Body mass index (BMI) 18.5-50 kg/m2
• Subjects who are capable of giving informed consent and complying with all study procedures/requirements.
• Ownership of an iPhone model 6s or later, which the participant is willing to use for the study
• Access to Apple ID, password, and email address and willing to use them during the study
• Willing to use data and any accompanying charges as part of study participation
• Willing to complete all study procedures and adhere to study visit timelines
• Willing to be re-contacted for future research and/or follow-up

You may not qualify if…

• Active cancer diagnosis (excluding some melanomas)
• Have been 6-month weight unstable (gain/loss >10 lbs in last 6 months)
• Undergoing weight loss treatment
• PBRC employee, as previous reviewers argued that they are not representative of the community
• Women who are currently pregnant or breastfeeding (self-reported)
• Diagnosed with an uncontrolled thyroid disorder (controlled = 3 months of medication)
• Have had or plan to have weight loss surgery (gastric band removal may be allowed at PI discretion)
• Allergic to or unwilling to eat study foods provided (exceptions made at the discretion of the PI)
• Consume >28 alcoholic beverages per week
• Anyone severely immunocompromised
• Any condition or circumstance that in the judgement of the PI could interfere with study participation

Where it is running

• Pennington Biomedical Research Center — Baton Rouge, Louisiana, United States

Full record on ClinicalTrials.gov

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