Who is sponsoring NCT05666752?

NCT05666752 is sponsored by Hanyang University.

What drugs are being tested in NCT05666752?

Interventions in NCT05666752: Allium Cepa L. Peel Heated Water Extract, Placebo.

What condition does NCT05666752 study?

NCT05666752 studies Upper Respiratory Infection.

Is NCT05666752 still recruiting?

NCT05666752 is currently status unknown. Last updated 27 December 2022.

Last reviewed 2022-12-27 · How we verify

NCT05666752

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

A 8 Weeks, Randomized, Double-blind, Placebo-controlled Human Trial to Evaluate the Efficacy and Safety of Allium Cepa L. Peel Heated Water Extract on Immunity Enhancement

Status unknown NA Last updated 27 December 2022

What this trial tests

NA trial testing Allium Cepa L. Peel Heated Water Extract in Upper Respiratory Infection in 80 participants. Status unknown.

Timeline

7 November 2022

Primary endpoint
1 September 2023

1 September 2023

Quick facts

Lead sponsor	Hanyang University
Phase	NA
Status	Status unknown
Study type	INTERVENTIONAL
Allocation	randomized
Design	parallel
Masking	double
Primary purpose	prevention
Enrollment	80
Start date	7 November 2022
Primary completion	1 September 2023
Estimated completion	1 September 2023
Sites	1 location across South Korea

Drugs / interventions tested

Allium Cepa L. Peel Heated Water Extract
Placebo

Conditions studied

Upper Respiratory Infection — all drugs for Upper Respiratory Infection →

Sponsor

Hanyang University

Who can join

Adults 19 to 75, any sex, with Upper Respiratory Infection. Healthy volunteers can join.

What's being measured

Primary outcomes are the specific endpoints the trial is designed to prove or disprove.

Changes of Natural killer(NK) cell activity
Time frame: At week 0 and week 8
Changes of Natural killer(NK) cell activity will be assessed before and after the intervention. PBMCs were isolated by density gradient separation, resuspended in phosphate-buffered saline, and determined using trypan blue solution. Natural killer(NK) cell activity was calculated from the results of nonradioactive cytotoxicity assay kits. Effector cells (PBMCs) were seeded in 96-well plates, with

Sponsor's own description

This study was conducted to investigate the effects of daily supplementation of Allium Cepa L. Peel Heated Water Extract on Immunity Enhancement

Publications & conference data

1 peer-reviewed publication reference this trial (live from Europe PMC):

Effect of onion (<i>Allium cepa</i> L.) peel extract on natural killer cell and cytokines in a randomized, double-blind, placebo-controlled trial.
Cho H, Kim S, Lee SH, Park Y. · · 2024 · cited 1× · PMID 38352207 · DOI 10.4162/nrp.2024.18.1.33

Verify or expand the search:

Other recruiting trials for Upper Respiratory Infection

Currently open trials in the same condition.

NCT06876259 — Artificial Intelligence Diagnostic Decision Support to Reduce Antimicrobial Prescriptions in Young Children With Colds · NA · recruiting

Other Hanyang University trials

Trials by the same sponsor.

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NCT06812091 — Human Microbiome Research and Development for Overcoming Pediatric Diseases · recruiting
NCT04449224 — Comparative Effectiveness of Targeted Therapy in RA Patients · unknown
NCT03983408 — Impact of Korean Red Ginseng on Fatigue in Patients With Rheumatic Disease · NA · unknown

Verify against primary sources

ClinicalTrials.gov — authoritative US registry record
WHO ICTRP — international registry index
EU Clinical Trials Register
Sponsor press releases (Google)

Data sources for this page

Trial protocol + status: ClinicalTrials.gov NCT05666752 (US National Library of Medicine, public domain)
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Hanyang University
Last refreshed: 27 December 2022

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT05666752.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing