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Quercetin supplement tested to boost blood vessel health in obesity

NCT ID NCT06683534

Disease control Sponsor: Medical College of Wisconsin Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This phase 2 trial tests whether quercetin, a dietary supplement found in many fruits and vegetables, can improve the function of tiny blood vessels in young adults with obesity. Forty participants will take either quercetin or a placebo daily for 30 days. Researchers will measure blood vessel dilation and density using a camera under the tongue and laser probes on the forearm.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
quercetin (dietary supplement)
What this could lead to
If it works, this could point toward a simple supplement to protect blood vessels in people with obesity.
What could go wrong
This is a small, early-phase trial with only 40 participants. The supplement may not improve blood vessel function, and results may not apply to everyone.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 40 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Dec 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 40 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Obesity (BMI\>30) * Aged 18-40 years * English Speaking Exclusion Criteria: * BMI\>60 * Resting SBP ≥180 mmHg or DBP ≥ 110mmHg * Pregnancy or breastfeeding. * Prior history of myocardial infarction * Diagnosis of more than 1 risk factor for coronary artery disease (active smoker, diabetes mellitus- type 1 or 2, congestive heart failure, hyperlipidemia, hypertension) * Active mouth sores that affect the buccal mucosa.

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Conditions

The condition(s) this trial relates to.

cardiovascular disorder coronary microvascular disorder Obesity obesity disorder Overweight

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Cardiovascular diseases Cardiovascular diseases (CVD) Microvascular dysfunction Microvascular health Microvasculature Obesity and overweight

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Froedtert Hospital

    Wauwatosa, Wisconsin, 53226, United States

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