Polyphenol Intake, Mediterranean Diet Adherence, and Oxidative Stress in Pregnancy (PREGPOLY)
Effect of Polyphenol Intake and Adherence to the Mediterranean Diet on Oxidative Stress During Pregnancy
This study is a randomized controlled clinical trial designed to evaluate the effect of a polyphenol-rich dietary intervention during pregnancy on endothelial function, oxidative stress biomarkers, and maternal and neonatal outcomes.
Pregnancy is associated with metabolic and vascular adaptations, and complications such as gestational diabetes and hypertensive disorders are linked to endothelial dysfunction and increased oxidative stress. Dietary factors, particularly adherence to the Mediterranean diet and intake of polyphenol-rich foods, may play a protective role.
Pregnant women will be randomly assigned to either an intervention group or a control group. The intervention consists of daily consumption of 10 g of natural non-alkalized cocoa and structured dietary counseling aimed at achieving at least five daily servings of fruits and vegetables, alongside general Mediterranean diet recommendations.
The intervention will last 12 weeks, from early to mid-pregnancy. Biomarkers of endothelial function and oxidative stress will be measured at different time points, along with clinical maternal outcomes (including gestational diabetes and hypertensive disorders) and neonatal outcomes.
The aim is to determine whether this dietary intervention improves endothelial function, reduces oxidative stress, and contributes to better pregnancy outcomes.
Studieoversikt
Status
Status
Forhold
Forhold
Intervensjon / Behandling
Intervensjon / Behandling
Studietype
Studietype
Registrering (Antatt)
Registrering
Fase
Fase
- Ikke aktuelt
Kontakter og plasseringer
Studiekontakt
Studiekontakt
- Navn: Ana García Albarrán, RN, Midwife
- Telefonnummer: 923291100
- E-post: annagarcialbarran@usal.es
Studer Kontakt Backup
- Navn: María Begoña Ayuda Durán, PharmD
- Telefonnummer: +34 923 294 537
- E-post: bego_ayuda@usal.es
Studiesteder
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SALAMANCA
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Salamanca, SALAMANCA, Spania, 37007
- Hospital de Salamanca
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Ta kontakt med:
- Ana García Albarrán, RN, Midwife
- Telefonnummer: 923291100
- E-post: annagarcialbarran@usal.es
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Deltakelseskriterier
Kvalifikasjonskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
- Eldre voksen
Tar imot friske frivillige
Beskrivelse
Inclusion Criteria:
- Pregnant women aged 18 years or older.
- Singleton pregnancy.
- Gestational age between 8 and 11 weeks at enrollment.
- Receiving prenatal care within the Salamanca Health Area.
- Able to understand the study information and provide written informed consent.
- No clinical restrictions that would contraindicate dietary modifications.
Exclusion Criteria:
- Medical or obstetric conditions that contraindicate dietary modifications.
- Active metabolic, renal, or hepatic disease.
- Severe hyperemesis gravidarum or gastrointestinal disorders limiting food intake.
- Allergy or intolerance to cocoa.
- Habitual high cocoa or chocolate consumption (>30 g/day).
- Multiple pregnancy.
- Severe obstetric complications diagnosed before enrollment.
- Inability to comply with study procedures, attend follow-up visits, or communication barriers that could interfere with participation.
Studieplan
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Forebygging
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Enkelt
Antall våpen
Våpen og intervensjoner
Deltakergruppe / ArmDeltakergruppe / Arm |
Intervensjon / BehandlingIntervensjon / Behandling |
|---|---|
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Eksperimentell: Intervention Group
Participants will receive a daily dietary intervention consisting of 10 g of natural non-alkalized cocoa and structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables, in addition to general Mediterranean diet recommendations.
The intervention will last 12 weeks during pregnancy.
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Structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables and improving adherence to the Mediterranean diet.
Structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables and improving adherence to the Mediterranean diet.
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Aktiv komparator: Control Group
Participants will receive standard dietary advice based on general healthy eating and Mediterranean diet recommendations during pregnancy, without specific supplementation or structured dietary intervention.
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Structured nutritional counseling aimed at achieving at least five daily servings of fruits and vegetables and improving adherence to the Mediterranean diet.
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Hva måler studien?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Change in serum sVCAM-1 concentration
Tidsramme: Baseline, 24-28 weeks, and 32-36 weeks of gestation
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Change in serum soluble vascular cell adhesion molecule-1 (sVCAM-1) levels from baseline to 24-28 weeks of gestation, measured in [ng/mL].
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Baseline, 24-28 weeks, and 32-36 weeks of gestation
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Change in serum sFlt-1/PlGF ratio
Tidsramme: Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
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Change in the soluble fms-like tyrosine kinase-1 to placental growth factor (sFlt-1/PlGF) ratio from baseline to 24-28 weeks and 32-36 weeks of gestation.
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Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
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Change in serum nitric oxide concentration
Tidsramme: Baseline, 24-28 weeks, and 32-36 weeks of gestation.
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Change in serum nitric oxide (NO) concentration from baseline to 24-28 weeks and 32-36 weeks of gestation, measured in [pg/mL].
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Baseline, 24-28 weeks, and 32-36 weeks of gestation.
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Change in serum IL-6 concentration
Tidsramme: Baseline, 24-28 weeks, and 32-36 weeks of gestation
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Change in circulating interleukin-6 levels between baseline and follow-up assessments, measured in [pg/mL].
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Baseline, 24-28 weeks, and 32-36 weeks of gestation
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Change in Mediterranean Diet Adherence Screener (MEDAS) score
Tidsramme: Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
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Change in adherence to the Mediterranean diet measured using the Mediterranean Diet Adherence Screener (MEDAS).
Scores range from 0 to 14, with higher scores indicating greater adherence to the Mediterranean diet.
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Baseline, 24-28 weeks of gestation, and 32-36 weeks of gestation.
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Andre resultatmål
Andre resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
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Incidence of gestational diabetes mellitus
Tidsramme: 24-28 weeks of gestation.
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Occurrence of gestational diabetes mellitus diagnosed according to standard clinical criteria and routine screening procedures during pregnancy.
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24-28 weeks of gestation.
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Incidence of gestational hypertension
Tidsramme: From enrollment until delivery.
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Occurrence of gestational hypertension diagnosed according to standard clinical criteria during pregnancy.
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From enrollment until delivery.
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Incidence of preeclampsia
Tidsramme: From enrollment until delivery.
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Occurrence of preeclampsia diagnosed according to standard clinical criteria during pregnancy.
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From enrollment until delivery.
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Gestational age at delivery
Tidsramme: At delivery.
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Gestational age at the time of delivery measured in completed weeks of gestation.
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At delivery.
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Neonatal birth weight
Tidsramme: At delivery.
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Neonatal birth weight measured in grams.
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At delivery.
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Apgar score at 1 minute
Tidsramme: At delivery.
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Neonatal condition assessed using the Apgar score at 1 minute after birth.
Scores range from 0 to 10, with higher scores indicating better neonatal condition.
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At delivery.
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Apgar score at 5 minutes
Tidsramme: At delivery.
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Neonatal condition assessed using the Apgar score at 5 minutes after birth.
Scores range from 0 to 10, with higher scores indicating better neonatal condition.
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At delivery.
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Apgar score at 10 minutes
Tidsramme: At delivery.
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Neonatal condition assessed using the Apgar score at 10 minutes after birth.
Scores range from 0 to 10, with higher scores indicating better neonatal condition.
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At delivery.
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Neonatal intensive care unit admission
Tidsramme: At delivery
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Proportion of newborns requiring admission to the neonatal intensive care unit (NICU).
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At delivery
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Samarbeidspartnere og etterforskere
Sponsor
Sponsor
Etterforskere
Etterforskere
- Hovedetterforsker: Ana García Albarrán, RN, Midwife, University of Salamanca
- Studieleder: Susana González Manzano, PharmD, University of Salamanca
- Studieleder: María Begoña Ayuda Durán, PharmD, University of Salamanca
Studierekorddatoer
Studer hoveddatoer
Studiestart (Antatt)
Studiestart
Primær fullføring (Antatt)
Primær fullføring
Studiet fullført (Antatt)
Studiet fullført
Datoer for studieregistrering
Først innsendt
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Faktiske)
Først lagt ut
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
Sist oppdatering lagt ut
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Nøkkelord
Ytterligere relevante MeSH-vilkår
- Urogenitale sykdommer
- Sykdommer i det endokrine systemet
- Vaskulære sykdommer
- Kardiovaskulære sykdommer
- Kvinnelige urogenitale sykdommer og graviditetskomplikasjoner
- Metabolske sykdommer
- Graviditetskomplikasjoner
- Glukosemetabolismeforstyrrelser
- Sukkersyke
- Hypertensjon
- Ernæringsmessige og metabolske sykdommer
- Diabetes, svangerskap
- Preeklampsi
- Hypertensjon, Graviditet-indusert
Andre studie-ID-numre
Andre studie-ID-numre
- USAL-CT-2026-001
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
IPD-planbeskrivelse
At present, there is no finalized plan for sharing individual participant data (IPD). Due to the sensitive nature of maternal and neonatal health data and the presence of biological and clinical information, data sharing will be considered in accordance with institutional ethics requirements, participant consent, and applicable data protection regulations.
Any potential future sharing of de-identified data will be determined after study completion and in line with publication and regulatory requirements.
Legemiddel- og utstyrsinformasjon, studiedokumenter
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