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Effects of Goji vs. Fiber on Macular Degeneration
Effects of Goji Berry Intake on Risk of Age-related Macular Degeneration: A Randomized Clinical Trial
Who can join
Ages 65 to 95 · All sexes · Healthy volunteers welcome
Full eligibility criteria
Inclusion Criteria: * Family history of AMD * Hyperlipidemia or managed diabetes * 65 - 95 years of age Exclusion Criteria: * Dislike of, or allergy to, goji berries or any of the ingredients in the fiber-rich wafers and gummies (wheat, corn, oats, soy, natural orange flavor, xylitol, annatto, pectin, or other food ingredients) * Consumption of \> 2 alcoholic drinks per day * Indications of substance or alcohol abuse * Current or planned use of a blood thinner (e.g., Coumadin, Warfarin) at any time during study * Use of multi-vitamin or any other supplements that contain lutein and/or zeaxanthin (if willing to stop the supplement, subject can be enrolled 6 months from stop date) * Taking any new medications started within the past 6 months, or changes in medication regimen planned in the next 6 months (stable use greater than 6 months is not exclusionary) * Any planned international travel during the study * Consuming \>3 servings/day of a combination of spinach, kale, lettuce, orange bell peppers, corn, parsley, squash, broccoli, pumpkin, edamame * Regularly consuming \>3 eggs/day * Currently participating in any other interventional research study * Diagnosed with inflammatory bowel disease, irritable bowel syndrome, other gastrointestinal disorder, undergoing cancer therapy or immunocompromised, or diagnosis of another condition where lutein, zeaxanthin and/or fiber supplementation would be contraindicated or would interfere with ability to participate in the study * Any physical characteristic or condition that precludes ability to perform study procedures * Medical or psychiatric condition that, in the opinion of the Investigator, would compromise study findings or prevent the participant from completing the study
About the study
The goal of this project is to conduct a clinical trial in 60 participants ranging from age 65-95 who are at risk for age-related macular degeneration (AMD). The study will evaluate the effects of 14g of goji berry intake or an equivalent amount and type of fiber, five days a week for six months, on visual health, gut microbiome profiles, skin carotenoid measures, and lipoprotein profiles.
What is being tested
- Goji berry (dietary supplement)
- Fiber (dietary supplement)
Sponsor: University of California, Davis · Participants: 60 · Started: Apr 29, 2024
Contact the study team
- Denise Macias, CCRP · Phone: (916) 734-6303
Official record on ClinicalTrials.gov — NCT06237127
Locations in the U.S.
| California | UC Davis Eye Center, Tschannen Eye Institute, Sacramento |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.