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Frozen or fresh? new study tests vitamin d lab accuracy

NCT ID NCT07565064

Knowledge-focused Sponsor: American Laboratory Products Company Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at whether storing blood samples (frozen or at different temperatures) changes the accuracy of a vitamin D test called the ALPCO 25(OH) Vitamin D CLIA Kit. Researchers will compare results from fresh blood with those from stored samples in 80 healthy adults. The goal is to see if labs can use stored samples without affecting test reliability.

What this could mean

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

What this could lead to
If successful, this could confirm that the ALPCO vitamin D test kit works reliably on both fresh and stored blood samples, making lab testing more flexible.
What could go wrong
This is a small, early-stage lab study, not a treatment trial. It only tests measurement stability, not health outcomes, so results may not affect patient care directly.

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

About 80 people

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

Started

Apr 2026

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Who is studied

The study population will consist of adult volunteers from the general population, aged 22 years and older, who are able and willing to provide a blood sample. Participants are expected to represent a range of 25-hydroxyvitamin D \[25(OH)D\] levels, including deficient, insufficient, and sufficient concentrations. Subjects will be enrolled at clinical collection sites in the United States and will undergo a single blood draw for specimen collection.

Ages

22 years and older

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: * Male or female adults 22 years of age or older * Able and willing to provide a blood sample in accordance with the protocol * Able to understand the study requirements and provide written informed consent Exclusion Criteria: * Unable or unwilling to provide a blood sample * Current participation in another investigational study that may interfere with study results * Any condition that, in the opinion of the investigator, would preclude safe participation or compromise the integrity of the study

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Conditions

The condition(s) this trial relates to.

vitamin D deficiency

As listed by the trial registrant

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

Healthy volunteers Vitamin D deficiency Vitamin D insufficiency

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

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    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

  • ALPCO

    Salem, New Hampshire, 03079, United States

More trials for these conditions

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