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Tiny gene changes may explain why some people absorb vitamins better

NCT ID NCT02100774

Knowledge-focused Sponsor: Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how small genetic differences affect the way the body absorbs fat-soluble vitamins (D, E) and carotenoids from food. 45 healthy men ate special test meals, and researchers measured vitamin levels in their blood and fat tissue. The goal was to understand why people vary in how well they absorb these nutrients.

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.

Participants

45 people

The number who actually took part.

Start date

Jan 2009

Finished

Dec 2013

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.

Who is studied

healthy male adults.

Ages

18 to 60 years

Sex

Male participants only

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: gender : male age : 18 to 60 years old BMI: \[18 to 29.9\] kg/m2 Fasting Cholesterol concentration : \< 2,5 g/l Fasting triglyceride concentration \< 2 g/l Fasting glycemia ≤ 1,1 g/l Fasting Hemoglobin \< 13 g/dl HIV as well as hepatitis C and B negative Exclusion Criteria: smokers regular consumption of vitamin supplement \> 140 g/week alcohol vegetarian diseases drugs assumed to affect the metabolism of lipids or fat soluble micronutrients (e.g. ezetimibe)

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As listed by the trial registrant

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

Biological availability of vitamins and micronutrients

Contacts and locations

Locations

  • Centre d'Investigation Clinique de l'hôpital de la Conception

    Marseille, 13005, France