Nutrition for Precision Health, Powered by the All of Us

This study, called "Nutrition for Precision Health, Powered by the All of Us," aims to understand how different diets affect individuals. Researchers will use artificial intelligence to predict how your body responds to specific eating patterns. The study involves three different diets: Diet A (rich in fruits, vegetables, and whole grains), Diet B (higher in refined grains, processed foods, and sugary drinks), and Diet C (moderate-high in vegetables, meat, nuts, and dairy, with low grains and sugars). The main goal is to see how these diets impact your glucose (blood sugar), insulin, and triglyceride levels after a meal. You may be eligible to join if you are 18 or older and have already participated in the All of Us Research Program, including providing a DNA sample and completing certain health surveys. The study plans to enroll about 8,000 participants.

Study design
This interventional study has three modules, with about 8,000 participants in total. Some participants will follow three distinct diets in a crossover sequence at home, while others will follow the same diets in a supervised residential setting.
What's involved
Participants in the interventional modules will follow three distinct diets for 14 days each, with at least a 14-day break between diets. They will undergo assessments including clinical measures, biospecimen collection, wearable sensor monitoring, questionnaires, and a liquid meal test.
Compensation
Not stated in the trial record.
Follow-up
The primary endpoints for glucose, insulin, and triglycerides are measured at 4 hours after a diet-specific mixed meal tolerance test.

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

NCT05701657

Nutrition for Precision Health, Powered by the All of Us

Recruiting
NAAges 18+Interventional
RTI International
~8,000 participants
Updated 2026-07-15 on ClinicalTrials.gov
What's tested:Diet ADiet BDiet C

At a glance

Recruiting sites
14 of 14 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Glucose - Diet Specific mixed meal tolerance test (MMTT) Diet A
Measured over 4 hours
+11 more outcomes measured
Nutrition
Health
Dietary Habits
14 sites across 6 states
California4
Illinois3
Louisiana2
Massachusetts2
North Carolina2
Alabama1
  • Marie G Gantz, PhD · PRINCIPAL_INVESTIGATOR · RTI International

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Eligibility criteria

Inclusion

Overall Inclusion -- Participants 18 years of age or older who have completed the primary All of Us consent process, Electronic Health Record consent process, have provided at least one All of Us biospecimen suitable for DNA sequencing, and have completed All of Us Participant Provided Information (PPI) Modules 1-3 (Basics, Overall Health, and Lifestyle); Speak English or Spanish; Able and willing to comply with study requirements and consent to participate.
Module 1 -- Must be willing and able to comply with Module 1 protocol; Must provide informed consent for Module 1.
Module 2 -- Must have completed Module 1; Must provide informed consent for Module 2; Must agree to comply with protocol over a period of approximately 10 to 12 weeks and up to six months. This includes consuming only the foods provided during periods of controlled feeding. Module 2 has three controlled feeding periods each lasting approximately two weeks with at least two weeks between feeding periods, and up to 6 months allowed for completion of the Module.
Module 3 -- Must have completed Module 1; Must provide informed consent for Module 3; Must agree to comply with protocol over a period of approximately 10 to 12 weeks and up to 6 months. This includes being domiciled three times, for two weeks each, and consuming only the foods provided during the domiciled periods. There is at least two weeks between domiciled periods, and up to 6 months allowed for completion of the Module.

Exclusion

Module 1
Module 2
Module 3
  • Glucose - Diet Specific mixed meal tolerance test (MMTT) Diet A4 hours

    Area under the curve (AUC) for glucose measured during the diet-specific MMTT for Diet A.

  • Insulin - Diet Specific mixed meal tolerance test (MMTT) Diet A4 hours

    Area under the curve (AUC) for insulin measured during the diet-specific MMTT for Diet A.

  • Triglycerides - Diet Specific mixed meal tolerance test (MMTT) Diet A4 hours

    Area under the curve (AUC) for triglycerides measured during the diet-specific MMTT for Diet A.

  • GLP-1 - Diet Specific mixed meal tolerance test (MMTT) Diet A4 hours

    Area under the curve (AUC) for Glucagon-Like Peptide-1 (GLP-1) measured during the diet-specific MMTT for Diet A.

  • Glucose - Diet Specific mixed meal tolerance test (MMTT) Diet B4 hours

    Area under the curve (AUC) for glucose measured during the diet-specific MMTT for Diet B.

  • Insulin - Diet Specific mixed meal tolerance test (MMTT) Diet B4 hours

    Area under the curve (AUC) for insulin measured during the diet-specific MMTT for Diet B.

  • Triglycerides - Diet Specific mixed meal tolerance test (MMTT) Diet B4 hours

    Area under the curve (AUC) for triglycerides measured during the diet-specific MMTT for Diet B.

  • GLP-1 - Diet Specific mixed meal tolerance test (MMTT) Diet B4 hours

    Area under the curve (AUC) for Glucagon-Like Peptide-1 (GLP-1) measured during the diet-specific MMTT for Diet B.

  • Glucose - Diet Specific mixed meal tolerance test (MMTT) Diet C4 hours

    Area under the curve (AUC) for glucose measured during the diet-specific MMTT for Diet C.

  • Insulin - Diet Specific mixed meal tolerance test (MMTT) Diet C4 hours

    Area under the curve (AUC) for insulin measured during the diet-specific MMTT for Diet C.

  • Triglycerides - Diet Specific mixed meal tolerance test (MMTT) Diet C4 hours

    Area under the curve (AUC) for triglycerides measured during the diet-specific MMTT for Diet C.

  • GLP-1 - Diet Specific mixed meal tolerance test (MMTT) Diet C4 hours

    Area under the curve (AUC) for Glucagon-Like Peptide-1 (GLP-1) measured during the diet-specific MMTT for Diet C.