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Influence of the Gut Microbiome on Blueberry Polyphenol Metabolites
Who can join
Ages 18 and older · All sexes · Healthy volunteers welcome
Full eligibility criteria
Inclusion Criteria: * Healthy adults ≥18 years of age * Able and willing to provide informed consent * Willing and able to adhere to all study procedures and visit requirements Exclusion Criteria: * Age \<18 years * Pregnant or breastfeeding * Presence of chronic diseases, including but not limited to cardiovascular disease, diabetes, cancer, kidney, liver, gastrointestinal, or pancreatic disease * Use of medications for chronic diseases that may interfere with study outcomes * Any condition known to negatively impact nutrient absorption (e.g., inflammatory bowel disease, celiac disease, gastroparesis) * Anemia (hemoglobin \<13.5 g/dL in men or \<12.0 g/dL in women) * Body mass index (BMI) ≤18.5 kg/m² * Use of antibiotics within the past 2 months * Recent blood draw within 1 week prior to study participation * Currently participating in another research study involving a diet or exercise intervention * Known allergy or contraindication to blueberry products or study procedures * Unwilling or unable to comply with study requirements
About the study
The objective of this study is to determine whether inter-individual differences in the gut microbiome influence exposure to blueberry polyphenol metabolites. We will use pharmacokinetics of blueberry polyphenols after an acute blueberry exposure to group individuals into "metabotypes", groups of individuals based on similarity in their metabolite profiles. We will then use multi-omic approaches to determine whether the gut microbiome predicts an individual's metabotype.
What is being tested
- Freeze-dried blueberry powder beverage (other)
Sponsor: Colorado State University · Participants: 125 · Started: Jan 27, 2026
Contact the study team
- Tiffany Weir, PhD · Phone: (970) 491-4631
- Jenny Whittington, MS · Phone: (970) 310-6843
Official record on ClinicalTrials.gov — NCT07607158
Locations in the U.S.
| Colorado | Colorado State University; Food and Nutrition Clinical Research Laboratory; Gifford Building Room 216; 502 West Lake Street, Fort Collins, C, Fort Collins |
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.