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CompletedNCT07194720Updated Oct 1, 2025

Effects of the Cornelian Cherry Supplementation on the Selected Physiological Parameters in Marathon Runners

An interventional study of Cornus mas lyophilisate and Placebo in Healthy, sponsored by Wroclaw Medical University. Completed at 1 site in Poland. Open to male participants aged 45 Years to 75 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-10-01.

Sponsored by Wroclaw Medical University · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Registered 4 years after the study started (first participant enrolled Sep 2021, registered Sep 2025).
Phase
Not applicable
Study type
Interventional
Enrollment
18
Allocation
Randomized
Ages
45 Years to 75 Years
Sex
Male
01

Study summary

Growing body of evidence indicates favorable effects of Cornus mas (Cornelian cherry) supplements on cardiometabolic risk, including the improvement of HDL and glycemic indices, in line with vascular benefits. Experimental data feature bioactives from Cornelian cherry as potential modulators of vascular function and blood pressure, plausibly via endothelial nitric oxide-related pathways, with possible downstream effects on autonomic reflex control; nevertheless, such links in humans remain poorly explored to date, especially in terms of endurance training and hypoxia tolerance.

In this cross-over, placebo-controlled study, a group of healthy amateur long-distance runners underwent two stages of a four-week dietary intervention (separated by four weeks of washout period), receiving Cornelian cherry lyophilisate or placebo. Each supplementation stage was accompanied by the comprehensive evaluation of the cardio-respiratory parameters and endothelial function.

02

Conditions studied

  • Healthy

Keywords

  • Cornus mas L.
  • systemic vascular resistance
  • peripheral chemoreflex
  • endurance training
  • nitric oxide
  • endothelium
  • autonomic nervous system
  • blood pressure
03

In context

Lead sponsor

Wroclaw Medical University is the lead sponsor of 93 studies on the registry; 28 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
45 Years to 75 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Inclusion criteria

  • age above 45 years

Exclusion criteria

Exclusion Criteria:

  • chronic disease of the nervous, cardiovascular or respiratory system
  • disease of the digestive system, including history of the intestinal surgery, inflammatory bowel disease, celiac disease, lactose intolerance and other malabsorption disorders
  • blood pressure-lowering treatment within the past year
  • tobacco smoking within the past year
  • antibiotic/probiotic treatment and laxative/prokinetic usage in three months preceding the anticipated enrollment
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Double (Participant, Investigator)
Enrollment
18 participants (actual)

Study arms

  • Experimental
    Cornus mas lyophilisate

    Dietary Supplement: Cornus mas lyophilisate

  • Placebo comparator
    placebo

    Dietary Supplement: Placebo

Interventions

  • Dietary supplementCornus mas lyophilisate

    Participants receiving a Cornus mas (Cornelian cherry) lyophilisate for 4 weeks.

  • Dietary supplementPlacebo

    Participants receiving a starch- and sugar-based placebo for 4 weeks.

06

What researchers measure

Primary outcomes

  1. Systemic vascular resistance

    Resting systemic vascular resistance, evaluated non-invasively with a finger cuff-based device.

    Time frame: From the beginning to the end of a supplementation period at 4 weeks.

  2. Office blood pressure values (mean, systolic, diastolic)

    Resting arterial blood pressure values (mean, systolic, diastolic), measured continuously with a non-invasive, finger cuff-based device.

    Time frame: From the beginning to the end of a supplementation period at 4 weeks.

Secondary outcomes

  1. Peripheral chemoreflex sensitivity

    Peripheral chemoreflex sensitivity, measured with the transient hypoxia test.

    Time frame: From the beginning to the end of a supplementation period at 4 weeks.

  2. eNOS expression

    Endothelial nitric oxide synthase expression, evaluated in the peripheral blood samples.

    Time frame: From the beginning to the end of a supplementation period at 4 weeks.

07

Study locations

1 site
  • Wroclaw Medical University
    Wroclaw, Lower Silesian Voivodeship 50-376, Poland
08

References and documents

Individual participant data

Plan to share: No — This is a small trial which includes solely healthy volunteers. Therefore, data will not be shared at this instance.

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 1, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07194720
Lead sponsor
Wroclaw Medical University
Collaborators
Wroclaw University of Environmental and Life Sciences
Responsible party
Rafał Seredyński (Principal Investigator, Wroclaw Medical University) — Principal investigator
First posted
Sep 26, 2025
Start date
Sep 15, 2021
Primary completion
Apr 21, 2022
Completion
Apr 21, 2022
Last update
Oct 1, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.

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