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Berries, Bugs, and the Blues

NCT05817383 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2025-08-22

Study results available
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Summary

This study aims to investigate the impact of daily freeze-dried blueberry powder consumption on the gut microbiota, fecal short chain fatty acids, and depressive symptom severity in 40older, sedentary adults with depressive symptoms.

Conditions

  • Depressive Symptoms

Interventions

OTHER

Freeze-dried Blueberry Powder

Participants will be asked to consume 48 grams of freeze-dried blueberry powder (\~ equivalent to 2 cups of fresh blueberries) daily for 12 weeks. Participants will be asked to save any powder packet wrappers as a means to measure compliance. They will also be instructed to avoid consumption of foods/beverages that are high in anthocyanins and/or fiber.

OTHER

Placebo Powder

Participants will be asked to consume 48 grams of a nutritionally matched placebo powder (that does not contain fiber or anthocyanins) daily for 12 weeks. Participants will be asked to save any powder packet wrappers as a means to measure compliance. They will also be instructed to avoid consumption of foods/beverages that are high in anthocyanins and/or fiber.

Sponsors & Collaborators

  • Hebrew SeniorLife

    lead OTHER

Principal Investigators

  • Courtney Millar, PhD · Hebrew SeniorLife, Marcus Institute of Aging, Harvard Medical Schools

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
65 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-04-05
Primary Completion
2024-07-16
Completion
2024-07-16

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05817383 on ClinicalTrials.gov