Clinical trial Recruiting at 1 site Interventional Ages 18 to 40

Effects of fish oil on brown fat activation during cold exposure

Official title: Omega-3 Fatty Acid Modulation of Brown Adipose Tissue for Arctic Resilience

Run by Indiana University · NCT05822141 · Data updated 2026-11-12

This study is testing if taking fish oil can help healthy young adults better activate their brown fat and stay warm when exposed to cold temperatures.

More Cold Exposure trials

Quick facts

Study typeInterventional
Ages18 Years to 40 Years
SexAll
Enrollment30 (estimated)
SponsorIndiana University
Academic / other
Locations1 site (Bloomington, Indiana)
StatusRecruiting
StartedJune 12, 2023
Main results expectedDecember 2026
Study endsDecember 2026
Registry record updatedMay 26, 2026
Trial IDNCT05822141 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are healthy men and women aged 18-40 with a BMI between 18.5 and 24.9 who are moderately to highly active.

Probably not a fit

Patients with a history of cardiovascular disease, metabolic disorders, or those taking certain medications may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates whether fish oil supplementation can enhance the activation of brown adipose tissue and improve thermoregulation during cold exposure. It is a randomized, double-blind, placebo-controlled study involving 30 healthy participants aged 18-40, who will receive either fish oil or a placebo for 12 weeks. The study will assess various thermoregulatory responses, including core body temperature, shivering, and skin blood flow, through a controlled cold exposure protocol. This innovative approach aims to provide a comprehensive understanding of how fish oil may influence the body's response to cold environments.

Why it matters

Potential benefit: If successful, this study could lead to new dietary recommendations for improving thermal comfort and metabolic health during cold exposure.

How similar studies have gone: While the specific approach of using fish oil for brown fat activation during cold exposure is novel, related studies on dietary fats and thermoregulation have shown promising results.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male and female, between the ages of 18 to 40 years.
* Body Mass Index (BMI) of 18.5 to 24.9 kg/m2
* Considered "moderately to highly active" by the International Physical Activity Questionnaire (IPAQ) and the Physical Activity Readiness Questionnaire (PAR-Q+)

Exclusion Criteria:

* History of smoking or recreational smoking, hyperlipidemia, hypertension/cardiovascular disease, diabetes, renal disease, neurological disease, metabolic disease, and bleeding disorders or delayed clotting time.
* Taking SSRI's (antidepressants and anxiety medication), ADD/ADHD medication, and chronically consume pain medication (Aleve, Tylenol, CBD, etc).
* Have or have had chronic disorders of the rectum (e.g., cancer, surgery, active hemorrhoids, etc.) or who currently have related acute conditions (diarrhea, constipation, etc.).
* Have or have had a diagnosis of disorders related to immune suppression and/or autoimmune disease.
* Are pregnant or planning on being pregnant.
* Resting blood pressure of \> 130mmHg systolic or 90 mmHg diastolic.
* Resting Pulse rate of \> 100 bpm.
* History of regularly consuming fish oil supplements and/or regularly eating more than one fish meal per week.
* Consuming more than one fish meal per week during the study.

Where it's running

  • Human Perfromance Lab, Indiana University
    Bloomington, Indiana, United States
    Recruiting

Study contacts

  • Principal investigator: Timothy D Mickleborough, PhD — Indiana University
  • Study coordinator: Timothy D Mickleborough, PhD
  • Email: tmickleb@indiana.edu
  • Phone: 812-855-0753

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Cold-region exposure and heart remodeling after PCI

    This study tests whether long-term cold exposure before PCI is linked to worse heart remodeling and outcomes in people with coronary artery disease.

    Recruiting Chinese PLA General Hospital · Beijing, Please Select An Option Below · NCT07773870

  • Cold exposure with PD-1/PD-L1 immunotherapy in solid tumors

    This phase 1 study tests whether adding controlled cold exposure to standard PD-1/PD-L1 therapy is safe and feasible in adults with solid tumors.

    Recruiting Phase 1 West China Hospital · Chengdu, Sichuan · NCT07538479

  • High-energy nutrition bars for cold-weather exercise

    This will test whether eating a 350-kcal high-fat versus high-carbohydrate bar helps preserve energy stores and aerobic performance during short cold exposure in physically active adults, including military personnel.

    Recruiting United States Army Research Institute of Environmental Medicine · Natick, Massachusetts · NCT07489690

  • Short cold sessions to grow and activate brown fat

    This study will test whether daily two-hour cold sessions in healthy adults (ages 18–40) change the activity and gene patterns of brown fat, white fat, and muscle.

    Recruiting University of Edinburgh · Edinburgh · NCT07048405

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.