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Gestational Diabetes Mellitus (GDM)NCT07685015

The Impact of Myo-Inositol on Glycemic Control and Oxidative Stress in Gestational Diabetes Mellitus

A study testing Myo-inositol 2 g + Folic acid 200 µg, Folic acid 200 µg and Insulin therapy in people with Gestational Diabetes Mellitus (GDM), run by Medical University of Vienna at 2 sites in Austria.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The purpose of this clinical study is to investigate the potential effects of myo-inositol supplementation on changes in glycemic control parameters, oxidative stress, inflammatory biomarkers, psychometric markers, and body composition in participants with gestational diabetes mellitus (GDM). Read more about this study

Who is it for?
Ages 18 to 45 years, women only
Conditions the study is for
Gestational Diabetes Mellitus (GDM)
What is being tested?
Myo-inositol 2 g + Folic acid 200 µg, Folic acid 200 µg and Insulin therapy
Could I receive a placebo?
No, everyone receives an active treatment
How many people
40 participants
Where
2 sitesAustria
Study dates
23 Mar 2026to 1 Jul 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 45 years
  • Women only
  • No healthy volunteers
  • Adult

Who may be able to join

  • GDM diagnosis
  • at least one of the HAPO-Study criteria: 2h-oGTT → >153 mg/dl, 1h-oGGT → >180 mg/dl, fasting plasma glucose > 92 mg/dl
  • age between 18-45
  • single pregnancy

Who cannot join

  • T2DM
  • T1DM
  • Maturity Onset Diabetes of the Young (MODY)
  • Latent Autoimmune Diabetes in Adults (LADA)
  • pre pregnancy BMI >35
  • oral antidiabetic drugs
Show all 9Show fewer
  • pre-existing renal disease
  • heart disease and other chronic medical disorders
  • allergies to any ingredients contained in the dietary supplements

Trial locations and contacts

2 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Michael Priv.Doz. Dr.med.univ. Leutner, PhD MSc contact

+43 1 404 00-60950

michael.leutner@meduniwien.ac.at

Ricarda Rosalia Baron, MSc, Msc contact

+43 1 404 00-20690

Ricarda.Baron@meduniwien.ac.at

Austria2 sites, 2 recruiting
  • Allgemeines Krankenhaus (AKH) Vienna, Medical University of Vienna

    Vienna, State of Vienna, 1090

    Ricarda Rosalia Baron Baron, MSc, + 43 40400 20690, Ricarda.Baron@meduniwien.ac.at

    Recruiting
  • Medical University of Vienna

    Vienna, State of Vienna, 1090

    Michael Priv.Doz. Dr.med.univ. Leutner, PhD MSc, +43 1 404 00-60950, Michael.Leutner@meduniwien.ac.at

    Ricarda Rosalia Baron, MSc, MSc

    Recruiting

Other trials in Austria

About this study

Official title: The Impact of Myo-Inositol Supplementation on Glycemic Control and Oxidative Stress in Women With Gestational Diabetes Mellitus: A Randomized, Open-Label Pilot Study

The purpose of this clinical study is to investigate the potential effects of myo-inositol supplementation on changes in glycemic control parameters, oxidative stress, inflammatory biomarkers, psychometric markers, and body composition in participants with gestational diabetes mellitus (GDM).

The study duration is 3 to 3.5 months, depending on the time of GDM diagnosis. Before the active phase begins, there is a 10-day observation period during which participants' blood glucose levels are monitored using a continuous glucose monitoring device. In the subsequent 12-14-week study phase, participants will receive a supplement based on random group assignment. They will be allocated either to an intervention group (myo-inositol + folic acid) or a control group (folic acid). Both supplements will be taken until delivery.

Read more

The intervention group supplement contains 4 g myo-inositol and 400 μg folic acid (BIOGENA GmbH, Salzburg) and is to be taken twice daily with water - three capsules per meal. The control group supplement contains only 400 μg folic acid (BIOGENA GmbH, Salzburg) and is also taken twice daily, one capsule per meal. As this is a pilot study, both participants and study personnel will be aware of group assignments.

Blood glucose measurements will be repeated mid-study (around the 33rd week of pregnancy) and at the end (37th week of pregnancy) using glucose sensors. To improve the evaluation of glucose measurements, participants will keep dietary logs during these periods.

Three study visits are planned, during which the following assessments will be conducted. To determine the primary outcome, "time in range (TIR)" (time spent within the target glucose range), three glucose sensor measurements will be performed. At each visit, blood samples will be taken to analyze glycemic control parameters (hemoglobin A1c (HbA1c), fasting glucose, fasting insulin, Homeostasis Model Assessment (HOMA-IR), insulin dosage), oxidative stress markers (total antioxidant capacity, malondialdehyde levels), and inflammatory markers (interleukin-6 (IL-6), C-reactive protein (CRP)). Anthropometric measurements (weight gain, blood pressure, pulse) and body composition (Bioelectrical Impedance Analysis) will also be performed.

Additionally, maternal and fetal birth outcomes will be recorded, including cesarean section rates, fetal gestational weight, preterm birth rates, and neonatal hypoglycemia occurrence. To assess participants' well-being and physical activity, questionnaires will be distributed at the beginning and end of the study.

Being tested
Myo-inositol 2 g + Folic acid 200 µg, Folic acid 200 µg, Insulin therapy, Nutrition therapy
Keywords
Gestational Diabetes Mellitus, GDM, Myo-Inositol, Continous Glucose Monitoring, CGM, Oxidative Stress, Inflammation, Glycemic Control, Inositol, MYO, MI, Pregnancy
Medical subject headings
Diabetes, Gestational, Inflammation

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Myo-inositol 2 g + Folic acid 200 µgDietary supplement

    This dietary supplement contains 2 g of myo-inositol and 200 µg folic acid per capsule. It should be taken twice a day (à 3 capsules) with fluid intake and a meal.

  • Folic acid 200 µgDietary supplement

    This dietary supplement contains 200 μg of folic acid per capsule and should also be taken twice a day (à 1 capsule) with adequate fluid intake and a main meal.

  • Insulin therapyDrug

    Women with GDM who maintain their blood glucose levels with insulin therapy.

  • Nutrition therapyBehavioural

    Women with GDM who maintain their blood sugar levels with nutritional therapy.

Study groups in NCT07685015
Study groupRoleWhat they receive
1. Intervention group (nutrition therapy + myo-inositol + folic acid)ExperimentalWomen who maintain their blood glucose levels within the normal range through nutritional therapy and receive the investigational supplement myo-inositol plus folic acid.
Receives: Dietary Supplement: Myo-inositol 2 g + Folic acid 200 µg; Behavioral: Nutrition therapy
2. Intervention group (insulin therapy + myo-inositol + folic acid)ExperimentalWomen who are already receiving insulin therapy to maintain their blood glucose levels within the normal range and receive the investigational supplement myo-inositol plus folic acid.
Receives: Dietary Supplement: Myo-inositol 2 g + Folic acid 200 µg; Drug: Insulin therapy
3. Control group (nutrition therapy + folic acid)Active comparatorWomen who maintain their blood glucose levels within the normal range through nutritional therapy and receive the supplement folic acid.
Receives: Dietary Supplement: Folic acid 200 µg; Behavioral: Nutrition therapy
4. Control group (inuslin therapy + folic acid)Active comparatorWomen who are already receiving insulin therapy to maintain their blood glucose levels within the normal range and receive the supplement folic acid.
Receives: Dietary Supplement: Folic acid 200 µg; Drug: Insulin therapy

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Time in Range

    Time in Range [%] measured with continous glucose monitoring

    Measured: 10 days at baseline (24.-28. gestational week), 10 days into gestational week 33, 10 days into gestational week 36/37

Secondary outcomes (28)
  1. Fasting glucose

    fasting glucose [mg/dl] concentration

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  2. Fasting insulin

    fasting insulin [μIU/mL] concentration

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  3. HOMA-IR

    HOMA-IR calculated as fasting insulin level (micro-units per milliliter) multiplied by the fasting blood glucose level (milligrams per deciliter), dividing the result by 405

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  4. HbA1c

    HbA1c [%] concentration

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  5. Insulin doses

    insulin units [IU]

    Measured: from day 1 until delivery

  6. Pre Pregnancy BMI

    weight [kg]/height [m]^2

    Measured: before pregnancy

  7. Height in meters

    height [m]

    Measured: at baseline

  8. Weight in kilograms

    weight [kg]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  9. Blood Pressure

    blood pressure [mmHg]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  10. C-Section (maternal and fetal outcomes)

    C-Section yes or no

    Measured: at delivery

  11. Hypoglycemia of the child (maternal and fetal outcomes)

    glucose values of the child [mg/dl]

    Measured: at delivery

  12. Preterm birth (maternal and fetal outcomes)

    delivery before 37. gestational week yes or no

    Measured: at delivery

  13. Gestational weight of the child (maternal and fetal outcomes)

    gestational weight of the child [kg]

    Measured: at delivery

  14. Oxidative stress parameter

    total antioxidative capacity [µmol/l]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  15. Oxidative stress parameter

    Malondialdehy status [µmol/l]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  16. Inflammatory parameter

    C-reactive protein [mg/dl]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  17. Inflammatory parameter

    interleucin-6 [pg/ml]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  18. Psychometric parameter

    Questionnaire: Pregnancy-related Anxiety score

    • minimum score: 10
    • maximum score: 50

    Measured: 24.-28. gestational week, 37. gestational week

  19. Psychometric parameter

    Questionnaire: Postnatal-Depression score

    • total possible score: 0-30
    • higher scores: more depressive symptoms

    Measured: 24.-28. gestational week, 37. gestational week

  20. Psychometric parameter

    Questionnaire: Perceived Stress score

    • minimum raw score: 20
    • maximum raw score: 80

    Measured: 24.-28. gestational week, 37. gestational week

  21. Physical Activity parameter

    Questionnaire: Physical Activity score [MET]

    • average daily energy expenditure by calculating the metabolic equivalents (METs) for each activity

    Measured: 24.-28. gestational week, 37. gestational week

  22. Nutritional log

    Food diary for 10 days

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  23. Bioelectrical Impedance Analysis (BIA)

    fat mass [kg]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  24. Bioelectrical Impedance Analysis (BIA)

    total body water [%]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  25. Bioelectrical Impedance Analysis (BIA)

    muscle mass [kg]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  26. Bioelectrical Impedance Analysis (BIA)

    fat free mass [%]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  27. Bioelectrical Impedance Analysis (BIA)

    body cell mass [%]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

  28. Bioelectrical Impedance Analysis (BIA)

    extracellular mass [%]

    Measured: 24.-28. gestational week, 33. gestational week, 37. gestational week

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted6 Jul 2026
  2. Study start23 Mar 2026
  3. Primary completion1 Apr 2027 (estimated)
  4. Study completion1 Jul 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Supportive care
Allocation
Randomised
Intervention model
Parallel groups
Model description
The study is designed as a single-center, open-label, randomized, controlled pilot study. The investigators aim to enroll 40 women with GDM, randomly allocated to one of the 4 groups. The interventions groups are divided in group 1 (nutrition therapy + myo-inositol + folic acid) and group 2 (insulin therapy + myo-inositol + folic acid). The control groups are separated in group 3 (nutrition therapy + folic acid) and group 4 (insulin therapy + folic acid).
Masking
None (open label)
Enrolment
40 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07685015
Sponsor's protocol ID
2469/2024
Status last verified
Jul 2026
First submitted
29 Apr 2025
Last updated
6 Jul 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Myo-inositol 2 g + Folic acid 200 µg, Folic acid 200 µg and Insulin therapy in people with Gestational Diabetes Mellitus (GDM), run by Medical University of Vienna at 2 sites in Austria.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 6 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in Austria. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Michael Priv.Doz. Dr.med.univ. Leutner, PhD MSc (+43 1 404 00-60950, michael.leutner@meduniwien.ac.at), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Time in Range (time frame: 10 days at baseline (24.-28. gestational week), 10 days into gestational week 33, 10 days into gestational week 36/37). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Jul 2026.

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