Clinical trial Recruiting at 1 site Interventional Ages 21 and up Women only

Fiber supplement plus counseling for constipation during pregnancy

Official title: Effectiveness of Daily Supplementation of a Fiber Nutritional Supplement (Materna® Opti-fiber) and Counselling for Constipation Management in Pregnancy

Run by Société des Produits Nestlé (SPN) · NCT07588633 · Data updated 2026-11-12

A daily fiber supplement (PHGG-based) with vitamin mix and nutrition counseling is being tested to see if it helps pregnant people with functional constipation.

Quick facts

Study typeInterventional
Ages21 Years and up
SexWomen only
Enrollment31 (estimated)
SponsorSociété des Produits Nestlé (SPN)
Industry-sponsored
Locations1 site (Osasco, São Paulo)
StatusRecruiting
StartedMay 8, 2026
Main results expectedAugust 8, 2026
Study endsOctober 8, 2026
Registry record updatedSeptember 25, 2026
Trial IDNCT07588633 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal participants are pregnant women 21 years or older, 13–27 weeks gestation, with singleton pregnancies and functional constipation per Cullen 2007 criteria for at least two weeks.

Probably not a fit

Participants who do not experience symptom improvement or who have intolerance to the supplement or counseling may receive no benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This open-label, single-arm study will enroll 31 pregnant women between 13 and 27 weeks gestation who meet Cullen 2007 criteria for functional constipation. Participants will take one sachet daily of Materna Opti fiber (about 5.8 g PHGG) for 4 weeks and receive standardized constipation counseling. The study assesses changes in constipation symptoms during the intervention period, alongside nutritional guidance. No control group is included, and outcomes will be collected through questionnaires in English.

Why it matters

Potential benefit: If successful, the approach could improve bowel regularity and comfort for pregnant individuals with constipation.

How similar studies have gone: Other trials using dietary fiber and counseling show potential benefit for constipation, but results can vary and this specific combination in pregnancy is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Pregnant women aged 21 years-old or above at recruitment
2. Gestational age of 13-27 weeks at recruitment
3. Singleton pregnancy at recruitment
4. Suffering from functional constipation according to the Cullen 2007 criteria which must include ALL the following and the criteria must be fulfilled for at least two weeks with symptom onset during pregnancy:

   1. Low frequency of stool (\<3/week)
   2. Hard stools
   3. Difficulty on evacuation
5. Able to understand and to sign a written Informed Consent Form (ICF) prior to study enrolment.
6. Willing and able to comply with the requirements for participation in this study
7. Willing and able to refrain from consuming other supplements containing fiber, prebiotics, or probiotics other than the Fiber Nutritional Supplement (Materna® Opti-fiber) over the intervention period
8. Able to respond to questionnaires in English

Exclusion Criteria:

1. Treated for constipation less than one week before the start of the study
2. Use of prebiotics or probiotics containing supplements two weeks prior to the study start
3. Major complications during pregnancy e.g., pre-eclampsia, gestational diabetes requiring insulin intervention, severe intra-uterine growth restriction (IUGR), fetal anomalies that in the opinion of the investigator may interfere with the pregnancy and participation in the clinical trial
4. Pre-existing medical conditions e.g., hypertension, diabetes mellitus, thyroid diseases, autoimmune diseases such as Systemic Lupus Erythematosus, antiphospholipid syndrome and other major chronic illness that in the opinion of the investigator may interfere with the pregnancy and participation in the clinical trial
5. Not willing and/or not able to comply with the study procedures and requirements
6. Known serious food allergy
7. Known or suspected history of allergy or intolerance to the investigational product (IP)
8. Active participation in another clinical trial or on-going observational study
9. Family or hierarchical relationships with the research team members

Where it's running

  • Medcin Pesquisa Clínica
    Osasco, São Paulo, Brazil
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.