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

2. juli 2026 opdateret af: Michael Leutner, Medical University of Vienna

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.

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.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

40

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

  • Østrig
    • State of Vienna
      • Vienna, State of Vienna, Østrig, 1090
        • Rekruttering
        • Medical University of Vienna
        • Kontakt:
        • Underforsker:
          • Ricarda Rosalia Baron, MSc, MSc
      • Vienna, State of Vienna, Østrig, 1090
        • Rekruttering
        • Allgemeines Krankenhaus (AKH) Vienna, Medical University of Vienna
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • 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

Exclusion Criteria:

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Støttende pleje
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 1. Intervention group (nutrition therapy + myo-inositol + folic acid)
Women who maintain their blood glucose levels within the normal range through nutritional therapy and receive the investigational supplement myo-inositol plus folic acid.
Kosttilskud: Myo-inositol 2 g + Folic acid 200 µg
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.
Adfærdsmæssigt: Nutrition therapy
Women with GDM who maintain their blood sugar levels with nutritional therapy.
Eksperimentel: 2. Intervention group (insulin therapy + myo-inositol + folic acid)
Women 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.
Kosttilskud: Myo-inositol 2 g + Folic acid 200 µg
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.
Medicin: Insulin therapy
Women with GDM who maintain their blood glucose levels with insulin therapy.
Aktiv komparator: 3. Control group (nutrition therapy + folic acid)
Women who maintain their blood glucose levels within the normal range through nutritional therapy and receive the supplement folic acid.
Adfærdsmæssigt: Nutrition therapy
Women with GDM who maintain their blood sugar levels with nutritional therapy.
Kosttilskud: Folic acid 200 µg
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.
Aktiv komparator: 4. Control group (inuslin therapy + folic acid)
Women who are already receiving insulin therapy to maintain their blood glucose levels within the normal range and receive the supplement folic acid.
Medicin: Insulin therapy
Women with GDM who maintain their blood glucose levels with insulin therapy.
Kosttilskud: Folic acid 200 µg
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.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Time in Range
Tidsramme: 10 days at baseline (24.-28. gestational week), 10 days into gestational week 33, 10 days into gestational week 36/37
Time in Range [%] measured with continous glucose monitoring
10 days at baseline (24.-28. gestational week), 10 days into gestational week 33, 10 days into gestational week 36/37

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Fasting glucose
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
fasting glucose [mg/dl] concentration
24.-28. gestational week, 33. gestational week, 37. gestational week
Fasting insulin
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
fasting insulin [μIU/mL] concentration
24.-28. gestational week, 33. gestational week, 37. gestational week
HOMA-IR
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
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
24.-28. gestational week, 33. gestational week, 37. gestational week
HbA1c
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
HbA1c [%] concentration
24.-28. gestational week, 33. gestational week, 37. gestational week
Insulin doses
Tidsramme: from day 1 until delivery
insulin units [IU]
from day 1 until delivery
Pre Pregnancy BMI
Tidsramme: before pregnancy
weight [kg]/height [m]^2
before pregnancy
Height in meters
Tidsramme: at baseline
height [m]
at baseline
Weight in kilograms
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
weight [kg]
24.-28. gestational week, 33. gestational week, 37. gestational week
Blood Pressure
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
blood pressure [mmHg]
24.-28. gestational week, 33. gestational week, 37. gestational week
C-Section (maternal and fetal outcomes)
Tidsramme: at delivery
C-Section yes or no
at delivery
Hypoglycemia of the child (maternal and fetal outcomes)
Tidsramme: at delivery
glucose values of the child [mg/dl]
at delivery
Preterm birth (maternal and fetal outcomes)
Tidsramme: at delivery
delivery before 37. gestational week yes or no
at delivery
Gestational weight of the child (maternal and fetal outcomes)
Tidsramme: at delivery
gestational weight of the child [kg]
at delivery
Oxidative stress parameter
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
total antioxidative capacity [µmol/l]
24.-28. gestational week, 33. gestational week, 37. gestational week
Oxidative stress parameter
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
Malondialdehy status [µmol/l]
24.-28. gestational week, 33. gestational week, 37. gestational week
Inflammatory parameter
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
C-reactive protein [mg/dl]
24.-28. gestational week, 33. gestational week, 37. gestational week
Inflammatory parameter
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
interleucin-6 [pg/ml]
24.-28. gestational week, 33. gestational week, 37. gestational week
Psychometric parameter
Tidsramme: 24.-28. gestational week, 37. gestational week

Questionnaire: Pregnancy-related Anxiety score

  • minimum score: 10
  • maximum score: 50
24.-28. gestational week, 37. gestational week
Psychometric parameter
Tidsramme: 24.-28. gestational week, 37. gestational week

Questionnaire: Postnatal-Depression score

  • total possible score: 0-30
  • higher scores: more depressive symptoms
24.-28. gestational week, 37. gestational week
Psychometric parameter
Tidsramme: 24.-28. gestational week, 37. gestational week

Questionnaire: Perceived Stress score

  • minimum raw score: 20
  • maximum raw score: 80
24.-28. gestational week, 37. gestational week
Physical Activity parameter
Tidsramme: 24.-28. gestational week, 37. gestational week

Questionnaire: Physical Activity score [MET]

- average daily energy expenditure by calculating the metabolic equivalents (METs) for each activity
24.-28. gestational week, 37. gestational week
Nutritional log
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
Food diary for 10 days
24.-28. gestational week, 33. gestational week, 37. gestational week
Bioelectrical Impedance Analysis (BIA)
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
fat mass [kg]
24.-28. gestational week, 33. gestational week, 37. gestational week
Bioelectrical Impedance Analysis (BIA)
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
total body water [%]
24.-28. gestational week, 33. gestational week, 37. gestational week
Bioelectrical Impedance Analysis (BIA)
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
muscle mass [kg]
24.-28. gestational week, 33. gestational week, 37. gestational week
Bioelectrical Impedance Analysis (BIA)
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
fat free mass [%]
24.-28. gestational week, 33. gestational week, 37. gestational week
Bioelectrical Impedance Analysis (BIA)
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
body cell mass [%]
24.-28. gestational week, 33. gestational week, 37. gestational week
Bioelectrical Impedance Analysis (BIA)
Tidsramme: 24.-28. gestational week, 33. gestational week, 37. gestational week
extracellular mass [%]
24.-28. gestational week, 33. gestational week, 37. gestational week

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Medical University of Vienna

Samarbejdspartnere

BIOGENA GmbH, Salzburg

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

23. marts 2026

Primær færdiggørelse (Anslået)

1. april 2027

Studieafslutning (Anslået)

1. juli 2027

Datoer for studieregistrering

Først indsendt

29. april 2025

Først indsendt, der opfyldte QC-kriterier

2. juli 2026

Først opslået (Faktiske)

6. juli 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

6. juli 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

2. juli 2026

Sidst verificeret

1. juli 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2469/2024

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