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Real-world evidence study on tolerance and growth in infants fed an infant formula with two human milk oligosaccharides vs mixed fed and exclusively breastfed infants. 2023
BACKGROUND Human milk oligosaccharides (HMOs) are important components of human milk having diverse functions in the development of infants. Randomized controlled trials (RCTs) have demonstrated that infant formulas with the HMOs 2'-fucosyllactose (2'FL) and lacto-N-neotetraose (LNnT) are safe, well-tolerated, and support normal growth. This study aimed to generate real-world evidence (RWE) on growth and gastrointestinal (GI) tolerance in infants consuming a formula with 1 g/L 2'FL and 0.5 g/L LNnT, including a mixed feeding group not studied before in RCTs. METHODS This 8-week open-label prospective multicenter study was conducted in Germany and Austria, and included groups of healthy, exclusively breastfed infants (BF), exclusively formula-fed infants (FF) who received the HMO-formula, and infants mixed fed with both HMO formula and human milk (MF). Co-primary outcomes were anthropometry and gastrointestinal tolerance via validated Infant Gastrointestinal Symptom Questionnaire (IGSQ). Secondary outcomes included formula satisfaction and adverse events (AEs). RESULTS One-hundred six infants completed the study (46 FF, 22 MF, and 38 BF). Mean anthropometric z-scores were comparable between groups and generally within ± 0.5 of WHO medians at week 8. IGSQ composite scores demonstrated good GI tolerance in all groups with no significant group differences at week 4 or 8. IGSQ composite scores in FF improved during the course of the study and parents provided high satisfaction ratings for the HMO-formula. Four potentially product-related AEs were reported in FF (no in MF). CONCLUSIONS In this RWE study examining an infant formula with HMOs, growth and GI tolerance outcomes were confirming the good tolerance and safety of this early feeding option previously reported in RCTs.
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