Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 to 45 Women only

Probiotic to improve iron levels and blood health during pregnancy

Official title: Mechanistic Pathways of Probiotic Supplementation in Optimizing Iron and Hematological Status Among Pregnant Females at Risk of Iron Deficiency Anemia

Run by University of Illinois Chicago · NCT07076849 · Data updated 2026-11-12

This trial will test whether taking the probiotic Lactiplantibacillus plantarum 299v can help pregnant people at risk of iron deficiency improve their iron and blood levels.

More Pregnancy trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 45 Years
SexWomen only
Enrollment250 (estimated)
SponsorUniversity of Illinois Chicago
Academic / other
Locations1 site (Chicago, Illinois)
StatusRecruiting
StartedFebruary 1, 2026
Main results expectedOctober 30, 2030
Study endsNovember 30, 2030
Registry record updatedNovember 2, 2026
Trial IDNCT07076849 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Pregnant people aged 18–45 with a singleton natural conception at 10–16 weeks gestation who have hemoglobin in the at-risk range (per protocol), can consent in English, and can attend visits at the study site are ideal candidates.

Probably not a fit

People with established iron deficiency anemia, other nutritional or hematologic disorders, recent blood transfusion, inflammatory bowel disease, recent antibiotic use, prior bariatric surgery, or other exclusionary conditions are unlikely to benefit from this intervention.

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

What this trial studies

This Phase 2 interventional study enrolls pregnant people at 10–16 weeks gestation who are at risk for iron deficiency based on specific hemoglobin ranges. Participants will take daily capsules of Lactiplantibacillus plantarum 299v or matching placebo and have hematologic and iron markers monitored during pregnancy. The probiotic is hypothesized to enhance non-heme iron absorption by altering gut microbiota, lowering intestinal pH, increasing mucin production, and promoting an anti-inflammatory intestinal environment. Study visits include blood testing and follow-up at the University of Illinois at Chicago to track iron status and safety.

Why it matters

Potential benefit: If successful, the probiotic could reduce the development of iron deficiency in pregnancy and lower the need for oral iron supplements with their gastrointestinal side effects.

How similar studies have gone: Prior small trials and mechanistic studies suggest Lactiplantibacillus plantarum 299v can enhance non-heme iron absorption, but evidence in pregnant populations is limited and not yet definitive.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* singleton naturally conceived pregnancy;
* at risk of IDA \[Hb 11.0 - 13.0 g/dL (first trimester) and Hb 10.5 - 12.5 g/dL (second trimester) based on new OB clinical complete blood count (CBC) results obtained from the EHR;
* 18 - 45 years old;
* 10-22 weeks GA;
* fluency in English to provide consent and complete study procedures;
* ability to provide consent;

Exclusion Criteria:

* IDA or other nutritional anemia (i.e., diagnosed or suspected B12 or folate deficiency) based on new OB blood work that includes MCV and MCH to characterize the anemia;
* recent blood transfusion;
* autoimmune disorder (e.g., rheumatoid arthritis);
* inflammatory bowel disease;
* oral or IV antibiotic use within 2 months;
* previous spontaneous preterm birth;
* history of bariatric surgery;
* malabsorptive disease;
* current hyperemesis;
* current eating disorder;
* hematologic disorder or trait carrier (e.g., hemochromatosis, β-thalassemia);
* current tobacco, alcohol or illicit drug use (Excluding marijuana).

Where it's running

  • University of Illinois at Chicago
    Chicago, Illinois, United States
    Recruiting

Study contacts

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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.