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Vitamin c may turn up your inner thermostat

NCT ID NCT07341308

Knowledge-focused Sponsor: Colorado State University 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 02, 2026 · Updated 1 time

Summary

This study looks at whether vitamin C can increase body heat produced by the nervous system and boost vitamin D levels in the blood. Researchers will measure temperature and blood samples in 20 overweight adults aged 18-40 during a stimulation test. The goal is to understand how vitamin C affects these processes, not to treat a disease.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 20 people

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

Started

Mar 2025

Expected to finish

Dec 2026

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

Accepted

You do not need to have the condition being studied to take part.

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: * Age 18-40 years (inclusive) * Body mass index greater than or equal to 25 kg/m2 and less than 30 kg/m2 * Weight stable (no change in body mass greater than 5 Lbs. within the previous 6 months. * Willing to abstain from caffeine and alcohol for 24-hours prior to two different study visits * Competency in English as assessed by comprehension of the Informed Consent. This is study involves invasive procedures and infusion of a systemic vasoactive agent (isoproterenol); for safety reasons, the ability for clear and rapid communication will be necessary between the research participants and the investigators. Exclusion Criteria: * History of autonomic, cardio-pulmonary, and/or metabolic disease (including heart failure, hypertension, arrhythmia, vascular disease, and/or diabetes) * Pregnancy or breast feeding * Habitual use of tobacco/nicotine products or recreational drugs (2 or more uses within the previous month) * History of a "sulfite allergy" as it is a relative contraindication to isoproteronol use. * Has ingested vitamin supplements and/or antioxidant supplements during the previous 4-weeks (e.g. Vitamin C, Vitamin E, Multi-vitamins, etc.)

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Conditions

The condition(s) this trial relates to.

metabolic disease vitamin D deficiency

As listed by the trial registrant

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

Metabolism changes Vitamin D

Contacts and locations

Locations

  • Colorado State University

    Fort Collins, Colorado, 80523, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.