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Your biological age may shift with the seasons, new study suggests

NCT ID NCT07242833

Knowledge-focused Sponsor: Société des Produits Nestlé (SPN) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether the time of year—summer vs. winter—changes a person's biological age, which is a measure of how fast their body is aging. Researchers will track 60 healthy adults over 40 for 12 months, using blood or saliva tests to calculate aging clocks. The goal is to understand how seasonal factors like vitamin D and lifestyle affect aging, which could improve future anti-aging studies.

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 60 people

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

Started

Nov 2025

Expected to finish

Aug 2027

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

In this study we will aim to enroll a total of 60 participants (accounting for a 20% drop out rate), living in Switzerland, that are over 40-year-old. The study aims to enroll male and female with balanced representation of each sex.

Ages

40 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: 1. Males and females aged over 40 years, inclusive, at enrolment. 2. Assessed by the investigator to be in general good health or have stable, well-controlled chronic medical conditions (e.g. hypertension, type 2 diabetes, etc.) that are not expected to interfere with study participation or outcomes. (Note: stable medical condition is defined as controlled medical condition, with no change in medication, worsening of the condition, or hospitalization in the past 3 months prior to enrolment). 3. Body mass index (BMI) ≥18.5 kg/m². 4. Able to understand and to sign a written informed consent prior to study enrolment. 5. Willing and able to comply with the requirements for participation in this study. Exclusion Criteria: 1. Any past or on-going significant medical/surgical condition and/or psychiatric condition, which in the opinion of the investigator may risk participant's wellbeing/safety, impede participant compliance with study procedures or ability to complete the study and/or could confound the primary objectives of the study (such as seasonal allergy). 2. Any acute illness or any recent medical/surgical intervention, including vaccination, within 21 days prior to enrolment. 3. Female participants who are pregnant or intending to become pregnant, lactating and/or breastfeeding 4. Currently participating in another interventional research study. 5. Family or direct hierarchical relationship with the research team members.

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Conditions

The condition(s) this trial relates to.

Chronobiology Disorders

As listed by the trial registrant

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

Aging Aging, biological Aging, healthy Biological clock disturbance Biological clocks

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

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    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

  • Clinical Lab

    RECRUITING

    Lausanne, CH, 1000, Switzerland

More trials for these conditions

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