Vitamin D3 Supplementation: Young Adults vs. Seniors

We are comparing how vitamin D3 affects young adults and seniors to find the best supplementation approach for each group. The study also examines how respiratory illnesses might influence vitamin D levels.

1-2 years 6-10 visits Confirmation phase (III)No Placebo Standard Medicines OralAllergologyDermatologyEndocrinologyInfectious DiseasesInternal MedicineNephrologyOphthalmologyOtolaryngologyPediatricsPsychiatryPulmonology

What diseases are being studied?

Health conditions and diseases that the clinical trial is designed to study and treat.

Who can participate in the clinical trial?

These questions help us understand your situation so we can let the trial team know whether you might be a potential match. This is not a medical evaluation and is not part of the official screening, the study doctor will make the final decision..

What medicines are being studied?

Medicines that are officially approved for use in the European Union and considered safe by EMA. These medicines are already on the market and may be tested for new conditions or populations.

Vigantol

Vigantol is a vitamin D supplement used to prevent or treat vitamin D deficiency and support bone health.

What active substances are being studied?

Active substances that are officially approved for use in the European Union and considered safe by EMA. These substances are already on the market and may be tested for new conditions or populations.

Colecalciferol

Colecalciferol is a substance that raises vitamin D levels to support healthy bones and maintain normal calcium balance.

What similar medicines might you know?

Don't worry if you don't know the medicines tested in the trial. There is a chance you have heard about the similar medicines. Check the list below to see if you are familiar with any of them.

Accrete D3

Accrete D3 One A Day

Acid Alendronic/Colecalciferol Accord

Where is the clinical trial being conducted?

Locations and medical facilities where this clinical trial is currently recruiting or conducting research. Select the locations where you would like to participate.

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Fakultni Nemocnice Plzen

II. Internal Clinic

Pilsen, Czechia

Sponsor: Fakultni Nemocnice Plzen

Last updated: Nov 26, 2025

Disclaimer: Parts of this content have been automatically extracted from the EU Clinical Trials registry. While we strive for accuracy, please always contact the trial site or sponsor directly for correct and official information before making any decisions about participation. View on EU Clinical Trials.