Clinical trial Recruiting at 1 site Interventional Ages 16 to 40 Women only

L-citrulline supplementation during pregnancy to reduce adverse birth outcomes in Kenyan women at risk of malaria.

Official title: Oral Antenatal L-citrulline Supplementation to Reduce Adverse Pregnancy Outcomes: a Two-arm, Randomized, Placebo-controlled Multi-site Trial in Kenya

Run by Liverpool School of Tropical Medicine · NCT05934318 · Data updated 2026-11-12

This trial will test whether taking a twice-daily L-citrulline supplement during pregnancy helps Kenyan women at risk of malaria have healthier pregnancies and babies.

More Pregnancy trials

Quick facts

Study typeInterventional
Ages16 Years to 40 Years
SexWomen only
Enrollment2960 (estimated)
SponsorLiverpool School of Tropical Medicine
Academic / other
Locations1 site (Kisumu)
StatusRecruiting
StartedDecember 29, 2023
Main results expectedDecember 30, 2026
Study endsDecember 30, 2026
Registry record updatedJune 27, 2025
Trial IDNCT05934318 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Pregnant women aged 16–40 with a viable singleton pregnancy up to 24 weeks' gestation, living in the study area and willing to attend monthly visits and deliver at a study clinic are ideal candidates.

Probably not a fit

Women with multiple pregnancies, pre-existing hypertension, renal disease, diabetes, severe anaemia, HIV positivity or unknown HIV status, lactose intolerance, inability to consent, or who cannot deliver at a study clinic are excluded and 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

AGREE is an individually randomized, two-arm, placebo-controlled trial enrolling 2,960 pregnant Kenyan women up to 24 weeks' gestation. Participants are randomly assigned to receive either a twice-daily 6.0 g sachet containing 5.00 g L-citrulline plus standard antenatal care or a taste-matched placebo sachet, with monthly visits through delivery. The primary outcome is a composite of fetal loss, preterm birth, small for gestational age, or low birthweight, and the trial includes safety monitoring and assessment of placental development. The trial targets women at high risk of malaria and protein undernutrition and requires ultrasound-confirmed singleton pregnancies and delivery at study clinics.

Why it matters

Potential benefit: If successful, a low-cost L-citrulline supplement could lower rates of fetal loss, preterm birth, and low birthweight and improve newborn health in low-resource settings.

How similar studies have gone: Preclinical models have shown that L-arginine or citrulline improves placental development and pregnancy outcomes, while human data are limited but suggest potential benefit.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Pregnant women aged 16-40 years,
* inclusive to 24 weeks gestational age as confirmed by ultrasound,
* who have a viable singleton pregnancy,
* are residents of the study area,
* willing to adhere to scheduled and unscheduled study visit procedures,
* willing to deliver in a study clinic or hospital

Exclusion Criteria:

* multiple pregnancies (i.e. twin/triplets);
* pre-existing hypertension, renal disease and/or diabetes, or severe anaemia (Hb \< 5 g/dL);
* HIV-positive or HIV status unknown;
* malformations or nonviable pregnancy observed on enrolment ultrasound;
* known allergy or contraindication to any of the study supplements including lactose intolerance or observing a lactose-free diet;
* unable to give consent; or concurrent participation in any other clinical trial

Where it's running

  • KEMRI Centre for Global Health Research
    Kisumu, Kenya
    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.