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Vitamin d pills tested for obese Teens' heart health

NCT ID NCT02400151

Disease control Sponsor: Centre Hospitalier Universitaire de Nīmes 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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at whether giving vitamin D supplements to obese teenagers, along with a healthy diet and exercise program, could improve how well their blood vessels work. 49 teens took either vitamin D or a placebo for 90 days. The main goal was to see changes in blood vessel function, which is important for heart health.

What this could mean

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

Active substance
Vitamin D3
What this could lead to
If successful, this could show that adding vitamin D to diet and exercise helps improve blood vessel health in obese teens, pointing toward a simple supplement to reduce heart risks.
What could go wrong
This is a small, completed Phase 4 trial with only 49 participants. Results may not apply to all teens, and vitamin D alone is unlikely to be a major solution for obesity-related problems.

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 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

49 people

The number who actually took part.

Started

Mar 2015

Finished

Jul 2016

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

11 to 17 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.

General Inclusion Criteria: * The patient's legal representatives must have given their informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * Sexual maturation of at least Tanner stage 2 Inclusion criteria for the patient population * The subject has a body mass index corresponding to grade 2 obesity according to the curves described by Rolland-Cachera et al (1991) * Absence of at least 5% of total weight over the last 3 months Inclusion criteria for the control population * The subject has a body mass index \< 90th percentile Exclusion Criteria: * The patient is participating in another study * The patient is in an exclusion period determined by a previous study * The patient is under judicial protection * The patient's legal representative(s) refuse(s) to sign the consent * It is impossible to correctly inform the patient or his/her legal representative(s) * The patient has a contraindication for physical activity (joint, heart or other) * The subject does at least 3 hours of extracurricular physical activity per week * The subject has a concomitant illness, a history of first-degree cardiovascular disease, abnormal glucose tolerance (pre-diabetes or diabetes). * Active smoking * Known dyslipidemia (particularly hypercholesterolemia). * The subject regularly takes food and vitamin supplements and refuses to stop taking these during the study (in case of disruption of these supplements, a wash-out stopping period of 3 weeks is required). * BMI corresponding to a grade 1 obesity according to the Rolland-Cachera et al. (1991) curves. * Secondary or known genetic obesity. * Known hypersensitivity to vitamin D. * Hypercalcemia, hypercalciuria, calcium lithiasis

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder

As listed by the trial registrant

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

Obesity

Contacts and locations

Locations

  • CHRU de Nîmes - Hôpital Universitaire Carémeau

    Nîmes, 30029, France

  • Institut Saint Pierre

    Palavas-les-Flots, 34250, France

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