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Could a simple sugar help people with type 1 diabetes exercise safely?

NCT ID NCT05557227

Disease control Sponsor: University of Aarhus 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 29, 2026 · Last updated Jun 30, 2026 · Updated 1 time

Summary

This study investigates whether drinking galactose before cycling can prevent low blood sugar (hypoglycemia) in people with type 1 diabetes. Fourteen participants will try four different drinks—dextrose, galactose, lactose, or a sweetened placebo—on separate days, then cycle for an hour. Researchers will measure how long it takes for blood sugar to drop and how much extra glucose is needed to keep levels safe. The goal is to find a better carbohydrate supplement for exercise management.

What this could mean

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

Active substance
galactose
What this could lead to
If galactose works better than other sugars, it could offer a simple way for people with type 1 diabetes to exercise with less risk of dangerously low blood sugar.
What could go wrong
This is a small, early-stage study with only 14 participants, so results may not apply to everyone. Galactose might not prevent hypoglycemia as hoped, and individual responses can vary.

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

14 people

The number who actually took part.

Started

Dec 2022

Finished

Jun 2024

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 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * type 1 diabetes for at least 2 years * age between 18 and 65 years * HbA1c less than 70 mmol/mol * Physically active (at least 150 minutes of moderate-to-vigorous intensity activity weekly) * Insulin pen and pump treatment * Men and women are eligible, but women will have to perform study days in the mid-cycle phase of the menstrual cycle. Exclusion Criteria: * \- Diabetic nephropathy, neuropathy, and proliferative retinopathy * Hypoglycemia unawareness * Lactose intolerance * Heart disease and other conditions which may be negatively affected by the VO2 max test and 1-hour cycling on study days

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Conditions

The condition(s) this trial relates to.

hyperglycemia hypoglycemia type 1 diabetes mellitus

As listed by the trial registrant

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

Hyperglycemia Hypoglycemia TYPE1DIABETES

Contacts and locations

Locations

  • Steno Diabetes Center Aarhus

    Aarhus, Region Midt, 8200, Denmark

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