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

2 juli 2026 uppdaterad av: 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.

Studieöversikt

Status

Rekrytering

Betingelser

Intervention / Behandling

Studietyp

Interventionell

Inskrivning (Beräknad)

40

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studera Kontakt Backup

Studieorter

  • Österrike
    • State of Vienna
      • Vienna, State of Vienna, Österrike, 1090
        • Rekrytering
        • Medical University of Vienna
        • Kontakt:
        • Underutredare:
          • Ricarda Rosalia Baron, MSc, MSc
      • Vienna, State of Vienna, Österrike, 1090
        • Rekrytering
        • Allgemeines Krankenhaus (AKH) Vienna, Medical University of Vienna
        • Kontakt:

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen

Tar emot friska volontärer

Nej

Beskrivning

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

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Stödjande vård
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: 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.
Kosttillskott: 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.
Beteende: Nutrition therapy
Women with GDM who maintain their blood sugar levels with nutritional therapy.
Experimentell: 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.
Kosttillskott: 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.
Läkemedel: 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.
Beteende: Nutrition therapy
Women with GDM who maintain their blood sugar levels with nutritional therapy.
Kosttillskott: 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.
Läkemedel: Insulin therapy
Women with GDM who maintain their blood glucose levels with insulin therapy.
Kosttillskott: 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.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Time in Range
Tidsram: 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

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Fasting glucose
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 24.-28. gestational week, 33. gestational week, 37. gestational week
HbA1c [%] concentration
24.-28. gestational week, 33. gestational week, 37. gestational week
Insulin doses
Tidsram: from day 1 until delivery
insulin units [IU]
from day 1 until delivery
Pre Pregnancy BMI
Tidsram: before pregnancy
weight [kg]/height [m]^2
before pregnancy
Height in meters
Tidsram: at baseline
height [m]
at baseline
Weight in kilograms
Tidsram: 24.-28. gestational week, 33. gestational week, 37. gestational week
weight [kg]
24.-28. gestational week, 33. gestational week, 37. gestational week
Blood Pressure
Tidsram: 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)
Tidsram: at delivery
C-Section yes or no
at delivery
Hypoglycemia of the child (maternal and fetal outcomes)
Tidsram: at delivery
glucose values of the child [mg/dl]
at delivery
Preterm birth (maternal and fetal outcomes)
Tidsram: at delivery
delivery before 37. gestational week yes or no
at delivery
Gestational weight of the child (maternal and fetal outcomes)
Tidsram: at delivery
gestational weight of the child [kg]
at delivery
Oxidative stress parameter
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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)
Tidsram: 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)
Tidsram: 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)
Tidsram: 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)
Tidsram: 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)
Tidsram: 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)
Tidsram: 24.-28. gestational week, 33. gestational week, 37. gestational week
extracellular mass [%]
24.-28. gestational week, 33. gestational week, 37. gestational week

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Medical University of Vienna

Samarbetspartners

BIOGENA GmbH, Salzburg

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

23 mars 2026

Primärt slutförande (Beräknad)

1 april 2027

Avslutad studie (Beräknad)

1 juli 2027

Studieregistreringsdatum

Först inskickad

29 april 2025

Först inskickad som uppfyllde QC-kriterierna

2 juli 2026

Första postat (Faktisk)

6 juli 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

6 juli 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

2 juli 2026

Senast verifierad

1 juli 2026

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 2469/2024

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