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Preventive Effect of a Dietary Supplement With Two Probiotic Limosilactobacillus Reuteri Strains on Excessive Crying and Colic in Healthy Newborns.

Double-blind, Randomized Placebo-controlled Trial for the Preventive Effect of Limosilactobacillus Reuteri (L. Reuteri) on Excessive Crying and Colic in Healthy Infants.

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07347743
Acronym
ProtectPrevent
Enrollment
768
Registered
2026-01-16
Start date
2026-01-31
Completion date
2028-12-01
Last updated
2026-02-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colic, Eczema Atopic Dermatitis, Healthy Infants

Keywords

Preventive effect, Limosilactobacillus reuteri, L. reuteri, crying, colic, healthy infants, newborns

Brief summary

This study aims to demonstrate that a dietary supplement, which contains two strains of the probiotic L. reuteri is safe, well tolerated and able to reduce the incidence of colic and excessive crying/fussiness in healthy infants. Additionally, the study aims to investigate if children with this probiotic supplement have better stool characteristics and a more beneficial composition of the fecal and skin flora than children given a placebo during the first 3 months of life.

Detailed description

This study is a double-blind, randomized, placebo-controlled trial conducted at UZ Brussel to evaluate the safety and preventive efficacy of a dietary supplement containing two probiotic strains of Limosilactobacillus reuteri on excessive crying and the development of infantile colic in healthy newborns. Recent systematic reviews and meta-analyses have shown that supplementation with certain strains of L. reuteri significantly reduces crying and fussing time in infants. A novel formulation combining those strains was developed to achieve a potentially enhanced effect on infant distress symptoms. This study investigates whether early supplementation, initiated within the first week of life, is safe and effective during the first three months of life. Healthy, full-term infants (≥37 weeks' gestation) aged 1-14 days at inclusion are eligible. Participants are randomized to receive either placebo plus vitamin D (400 IU) or L. reuteri plus vitamin D (400 IU) for a maximum of 98 days, until approximately 3 months of age. Study visits include a baseline visit (day 1-14), a midway visit at 6 weeks, an end-of-intervention visit at 3 months, and a long-term follow-up at 1 year. Additional telephone contacts are triggered by infant day diaries. The primary outcomes are peak crying and fussing time at 6 weeks of age and the occurrence of infantile colic during the first 3 months of life. Secondary outcomes include infant quality of life (ITQOL™), parental stress, parental satisfaction, crying and fussiness patterns, and the presence of atopic dermatitis. Exploratory outcomes assess changes in the intestinal microbiome, stool characteristics, biomarkers, growth, and allergy-related parameters. The primary hypothesis is that daily supplementation with the two strains of L. reuteri reduces the incidence of infantile colic and peak crying time at 6 weeks. Secondary hypotheses propose microbiome modulation leading to reduced distress, improved infant quality of life, and lower parental stress.

Interventions

DIETARY_SUPPLEMENTTwo probiotic Limosilactobacillus reuteri strains

Each participant in this intervention group gets 5 drops per day, containing the two probiotic Limosilactobacillus reuteri strains and 400 IU of Vitamin D

DIETARY_SUPPLEMENTPlacebo

Each participant in this intervention group gets 5 drops per day, containing only 400 IU of Vitamin D.

Sponsors

Universitair Ziekenhuis Brussel
Lead SponsorOTHER
BioGaia AB
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Intervention model description

Prospective, double-blind, parallel, randomized, placebo-controlled superiority trial.

Eligibility

Sex/Gender
ALL
Age
1 Days to 14 Days
Healthy volunteers
Yes

Inclusion criteria

1. Infant is born at the maternity ward of UZ Brussel with a gestational age of ≥37 weeks. 2. Infant is healthy at the time of pre-examination. 3. Infant is aged between 1 and 14 days old at the time of inclusion. 4. Legal guardian(s) are able and willing to follow the study instructions 5. Infant is suitable for participation in the study according to the investigator/ study personnel 6. Legal guardian(s) willing to refrain products containing probiotics for their infant, from baseline (visit 1) throughout the study period (visit 3). 7. Informed written consent given by parent / legal guardian

Exclusion criteria

1. No legal guardian's command of any local language 2. Infant with a major congenital anomaly (i.e. anal atresia, trisomy 21) or suspicion of any chronic disorder or disease (i.e. Hirschsprung's disease, metabolic disorder) 3. Infant is suffering from congenital or acquired immunodeficiency 4. Infant is suffering from an infection at the time of pre-examination or previous 7 days 5. Infant is admitted post-partum to the neonatal intensive care unit 6. Infant is not suitable for participation in the study according to the study personnel´s opinion

Design outcomes

Primary

MeasureTime frameDescription
Peak measured crying time6 weeksPeak measured crying time at 6 (±1) weeks according to the prospectively kept baby day diary
The occurrence of infant colic at any time in the first 3 months of life.3 monthsThe criteria for infant colic are: * Recurrent and prolonged periods of infant crying, fussing, or irritability reported by caregivers that occur without obvious cause and cannot be prevented or resolved by caregivers. Fussing refers to intermittent distressed vocalization and refers to behavior that is not quite crying but not awake and content either. * Caregiver reports infant has cried or fussed for 3 or more hours/day during 3 or more days in a given week. * Total 24-hour crying plus fussing in the selected group of infants is confirmed to be 3 hours or more when measured by at least one, prospectively kept, 24-hour behavior diary.

Secondary

MeasureTime frameDescription
Peak measured fussiness time6 weeksPeak measured fussiness time at the age of 6 (±1) weeks according to the prospectively kept baby day diary.
Overall crying and/or fussiness time3 monthsOverall (estimated + measured) crying and/or fussiness time in the first 3 months (±1 week) of life.
Overall unconsolable crying time3 monthsOverall measured and/or estimated unconsolable crying time in the first 3 months (±1 week) of life
Parental stress3 monthsParental stress as measured by the Parental Stress Scale (PSS) at 6 (±1) weeks and 3 months (±1 week) of both (if applicable) caregivers. Parents can indicate the degree to which they agree or disagree with the statements in this questionnaire, ranging from strongly disagree (1 point) to strongly agree (5 points). Total scores range from 18 points (low score signify a low level of stress) to 90 points (high score signify a high level of stress).
Quality of Life score12 monthsInfant and toddler quality of life questionnaire(ITQOL™) at 3 months (±1 week) and of 12 months (±2 weeks) age. ITQOL is scored on a scale from 0 to 100, where higher scores mean better health/quality of life.
Parental satisfaction3 monthsParental satisfaction scale measured by a 5-point Likert scale at 6 (±1) weeks and 3 months (±1 week). A scale where parents indicate how satisfied they are with their baby's current level of crying and fussing, with a minimum score of 2 and maximum score of 10. Parents who are very dissatisfied have a low score, while parents who are very satisfied have a high score.
Atopic dermatitis12 monthsPresence and degree of atopic dermatitis (AD, measured via SCORAD) at 3 months (±1 week) and 12 months (±2 weeks) of age. The score ranges from 0 to 103 and is used to determine the stages of AD severity. Where a score lower than 25 is seen as mild state, 25-50 is a moderate state and \>50 is a severe state.

Countries

Belgium

Contacts

CONTACTKoen Huysentruyt, Pediatric Gastroenterologist
koen.huysentruyt@uzbrussel.be+32 02/476.37.17
CONTACTLeontien Depoorter, Resident Pediatric Pulmonology
Leontien.Depoorter@uzbrussel.be+32 02/801.25.58
PRINCIPAL_INVESTIGATORKoen Huysentruyt, Pediatric Gastroenterologist

Universitair Ziekenhuis Brussel

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 20, 2026