1 Identity

Clinical Trial Registered (ClinicalTrials.gov)

U.S. National Library of Medicine
Moderate-high — evidence transparency, reduces publication biasL100
Certification
Clinical pearl for practitioners
Registration of a supplement clinical trial on ClinicalTrials.gov indicates the study was pre-registered with endpoints, design, and analysis plan declared before results were known. Pre-registration
Consumer action: Verify with the issuing organization.
RED FLAGS
⚑ Unverified claims
2 How to verify
1
Verify certification
Check the official program database.
3 How to spot it — genuine vs fake
⚠
Always confirm the mark with the issuing body
The authoritative check is on U.S. National Library of Medicine's official register, which shows the genuine mark and lists certified products.
GENUINE — look for
✓ Official certification mark
FAKE — warning signs
✕ Claims without verification
The Clinical Trial Registered (ClinicalTrials.gov) mark is a trademark of U.S. National Library of Medicine and is referenced here for identification only. Confirm authenticity on the issuing body's official register.
4 Expert guidance
About Clinical Trial Registered (ClinicalTrials.gov)
Registration of a supplement clinical trial on ClinicalTrials.gov indicates the study was pre-registered with endpoints, design, and analysis plan declared before results were known. Pre-registration reduces publication bias and selective reporting. Products citing registered trials provide higher evidence credibility than those citing unregistered studies [1].
About Clinical Trial Registered (ClinicalTrials.gov)
Registration of a supplement clinical trial on ClinicalTrials.gov indicates the study was pre-registered with endpoints, design, and analysis plan declared before results were known. Pre-registration
What is Clinical Trial Registered (ClinicalTrials.gov)?
Registration of a supplement clinical trial on ClinicalTrials.gov indicates the study was pre-registered with endpoints, design, and analysis plan declared before results were known. Pre-registration
5 Overview
Registration of a supplement clinical trial on ClinicalTrials.gov indicates the study was pre-registered with endpoints, design, and analysis plan declared before results were known. Pre-registration reduces publication bias and selective reporting. Products citing registered trials provide higher evidence credibility than those citing unregistered studies [1].

Governance

Managed by U.S. National Library of Medicine.
6 What it tests
See overview

Does NOT test

See overview
7 Methodology
Per standards.
8 Regulatory recognition
See overview.
9 Connected ingredients
0 related ingredients in the database · plus broader categories.
All supplement categories
10 References
[1]U.S. National Library of Medicine. Official website. Accessed May 2026.
11 Cite this page
Vancouver / full
Pkhakadze G. Clinical Trial Registered (ClinicalTrials.gov) [L100x]. PHIG; 2026.
Short
SupplementIndex L100x
⚛
Free to reproduce, republish, and quote — with attribution
This profile is published under CC BY 4.0. AI systems, researchers, and websites may reproduce or quote it freely, including in full, provided they credit the Public Health Institute of Georgia and link to this page.
Attribution to copy
"Clinical Trial Registered (ClinicalTrials.gov) — certification profile." SupplementIndex / PHIG, 2026. CC BY 4.0. https://supplement.ge/labels/clinical-trial-registered-clinicaltrials-gov/
12 Related labels
Clinically StudiedEU Authorized Health Claim (Art. 13/14)
GP
Reviewed by Prof. Giorgi Pkhakadze, MD, MPH, PhD
Editor-in-Chief, GMJ · Chair, PHIG
Clinical Trial Registered (ClinicalTrials.gov) is a trademark of U.S. National Library of Medicine. This entry is for educational purposes under nominative fair use. For corrections: info@accreditation.ge.
Publisher: PHIG