About Pricing FAQs Providers Blog

Loading clinical trials...

Your health journey, clearly organized.

Find Clinical Trials →

Legal

Privacy Policy
Terms of Service

© 2026 Clareo Health. All rights reserved.

Back to clinical trial search

COMPLETEDNANCT04775654

The Effects of Blackcurrant Supplementation on Eye Health

The purpose of this study is to evaluate the potential for supplementation with black currant to support eye health among otherwise healthy adult women who spend 6+ hours per day using digital screens...

Lead sponsor: Nutraceuticals Research Institute•1 U.S. locations•View source on ClinicalTrials.gov

Clareo plain-language summary

What this study is about

Generating AI summary...

Save this trial guide to your notes

Keep your clinical trial research organized — questions to ask, what to expect, and key details.

Sponsors

Lead Sponsor

Nutraceuticals Research Institute

Collaborators

Artemis International

Women who are informed about the study and provide informed consent will be randomized to one of two groups: supplement and placebo. Group assignment will be a 1:1 ratio to supplement (455mg of blackcurrant standardized to 50mg anthocyanins in 2 capsules/day) or placebo (2 capsules/day). Outcomes will be assessed at baseline and again on day 70.

Age

30 - 60 years

Sex

FEMALE

Healthy Volunteers

Yes

Inclusion Criteria

•Female
•Age 30-60
•Lives in the United States
•Employed full time in an online work environment OR enrolled full time in an online learning environment (average of 6+ hours per day)
•Ability to understand study instructions
•Ability to provide informed consent
•Residence within 100 miles of the study center

Exclusion Criteria

•Low blood pressure
•Uncontrolled hypertension (i.e. systolic/diastolic blood pressure \> 140/90)
•Uncontrolled diabetes (i.e. fasting blood glucose \>180mg/dl)
•Any blood clotting disorder
•Ocular disease
•Best corrected visual acuity \<20/30
•Cataracts
•Renal disease
•Active hepatitis or cirrhosis
•Acute or chronic infectious disease
•Pregnant
•Breastfeeding
•Currently trying to conceive
•Surgical or other invasive procedure planned within the intervention period

Related studies

Enrolling By InvitationNA

Efficacy of Investigator Product for the Amelioration of Digital Eye Strain in Children

NCT06589128 · Digital Eye Strain (DES)

Active Not Recruiting

The Role of Cultural Beliefs on Eye Health Practices Across Communities in District Rahim Yar Khan

NCT07049406 · Eye Strain

Effect of Yellow Light AG Mobile Phone Screen on Dry Eye and Asthenopia.

NCT07340359 · Digital Eye Strain, Computer Vision Syndrome, and more

AI Chatbot-Based Learning on Dry Eye and Eye Strain Knowledge

NCT06785155 · Health Behaviors, Artificial Intelligence (AI), and more

Study of the Association Between Digital Eye Syndrome With Binocular Vision and the Ocular Surface in Higher Education Students in the Area of Health Technologies

NCT05675475 · Digital Eye Strain

View all related studies →

Data from ClinicalTrials.govLast updated on ClinicalTrials.gov: January 24, 2022Terms

Trial snapshot

StatusCOMPLETED

PhaseNA

Enrollment57

Start dateMar 2021

Last updatedJan 24, 2022

Condition

Eye Strain Eye Fatigue

Locations shown

Franklin Health Research Center

Franklin, Tennessee

For caregivers

Use Clareo to keep notes, questions, trial details, and next steps organized before and after appointments.

Start free trial →

Data Source & Attribution

This clinical trial information is sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

ClinicalTrials.gov last update: January 24, 2022Data synced to Clareo: July 13, 2026

Modifications: This data has been reformatted for display purposes. Eligibility criteria have been parsed into inclusion/exclusion sections. Location data has been geocoded to enable distance-based search. For the authoritative and most current information, please visit ClinicalTrials.gov.

Neither the United States Government nor Clareo Health make any warranties regarding the data. Check ClinicalTrials.gov frequently for updates.

View ClinicalTrials.gov Terms and Conditions