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Krill oil and fasting: a new way to keep muscle while shedding pounds?

NCT ID NCT06001632

Disease control Sponsor: University of Glasgow 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 whether taking krill oil (a source of omega-3s) while following an alternate-day fasting diet helps adults with overweight or obesity lose fat without losing muscle strength. Fifty healthy adults were randomly assigned to receive either krill oil or a placebo for 20 weeks, which included a weight-loss phase and a maintenance phase. Researchers measured changes in body composition, muscle function, and inflammatory markers.

What this could mean

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

Active substance
krill oil (omega-3 fatty acids)
What this could lead to
If it works, this could point toward a way to lose weight while preserving muscle strength and reducing inflammation.
What could go wrong
This is a small, early-stage study (50 people) with no phase designation, so results may not apply to everyone. The supplement may not provide additional benefit beyond the fasting diet alone.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

50 people

The number who actually took part.

Started

Mar 2022

Finished

Oct 2025

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.

Ages

25 to 65 years

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: * Healthy (male/female) * body mass index (BMI) of 25 - 39.9 kg/m2 * Aged between 25 and 65 years * stable body weight for at least three months Exclusion Criteria: * Smokers * Food allergy * On any dietary supplements or dietary regimes at the time of the study * Participants with systolic/diastolic \<90/60 mmHg and \>140/90 mmHg

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder

As listed by the trial registrant

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

Obesity associated disorder

Contacts and locations

Locations

  • University of Glasgow, New Lister Building

    Glasgow, Scotland, G31 2ER, United Kingdom

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