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Healthy adult study paves way for safer preterm baby nutrition

NCT ID NCT06551545

Knowledge-focused Sponsor: The Hospital for Sick Children 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 aims to develop a method to measure how the body breaks down tryptophan, an essential amino acid. Ten healthy adults aged 18-45 will take a special tracer and provide blood and urine samples. The goal is to later use this method to improve nutrition for preterm babies on IV feeding.

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

10 people

The number who actually took part.

Started

Jan 2025

Finished

Jul 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

18 to 45 years

Sex

Male participants only

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. Consent provided 2. Aged 18 to 45 years old (inclusive) 3. In good general health as evidenced by medical history, physical health and biochemistry 4. Fasting blood glucose, hemoglobin A1c (HbA1c), urea, creatinine and CRP levels within normal ranges for age. Exclusion Criteria: 1. Presence of chronic disease and/or acute illness known to affect protein/amino acid metabolism (e.g. HIV, diabetes, cancer, liver or kidney disease, neurological conditions including depression and anxiety, hypo- / hyperthyroidism, inflammatory conditions,, anemia, acute cold or flu) 2. Taking medications known to affect protein/AA metabolism (e.g. steroids, anti-inflammatory medications, acetaminophen, selective serotonin reuptake inhibitors (SSRI)) 3. Inability to tolerate the diet (i.e. allergy) 4. Significant weight loss during the past month or consumption of weight reducing diets. 5. Significant caffeine consumption (\>2 cups per day) 6. Significant consumption of alcohol (\>1 drink per day i.e. 1 beer or ½ glass of wine). 7. Unwilling to have blood drawn from a venous access or using a ventilated hood indirect calorimeter for the purposes of the study.

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As listed by the trial registrant

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

Healthy

Contacts and locations

Locations

  • The Hospital for Sick Children

    Toronto, Ontario, M5G 1E8, Canada

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