Synbiotic blend formula improves B. infantis colonization and reduces inflammation in term infantsSynbiotic Formula May Reduce Inflammation and Infections in Infants

medRxiv Published October 10, 2026 Study authors: Chen, Q.; Chung, C. K.; Capeding, M. R. Z.; Trinidad-Aseron, M.; Tenorio-Quinones, V. M. R.; Barceni… DOI ↗ Editorial oversight: Dr. Sofia Müller, MD · Lifespan & Whole-Person Care

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Key Takeaway

Note that synbiotic formula may improve B. infantis colonization and reduce inflammatory markers in formula-fed infants.

This randomized controlled trial enrolled 240 healthy term infants in the Philippines to evaluate a synbiotic blend formula (SynF) containing seven HMOs, bovine milk oligosaccharides, and B. infantis LMG11588 compared to a control formula (CtrlF). The study followed infants for a duration of 6 months.

Primary outcome data were not reported. Secondary outcomes showed that SynF resulted in near universal B. infantis colonization compared to less than 10% in the CtrlF group. Infants fed SynF also demonstrated higher secretory IgA levels and lower markers of intestinal inflammation and systemic inflammation in plasma. Additionally, infants in the SynF group experienced fewer upper respiratory tract infections (URTI) and showed slower immune cell maturation. Growth was found to be non-inferior to the control formula.

Safety and tolerability data were not reported. The study suggests that synbiotic formula may dampen inflammatory responses to colonizing microbes and mild infections in fully formula-fed, term infants. However, the absence of a reported primary outcome and specific effect sizes limits the immediate clinical certainty of these findings.

Researchers conducted a randomized controlled trial in the Philippines to study the effects of a synbiotic blend formula on 240 healthy term infants. The study compared a special formula containing Bifidobacterium infantis and several human milk oligosaccharides against a standard control formula over a six-month period.

The results showed that infants fed the synbiotic formula had much higher rates of Bifidobacterium infantis colonization compared to those on the control formula. These infants also showed lower markers of intestinal and systemic inflammation, as well as higher levels of secretory IgA. Additionally, the infants receiving the synbiotic formula experienced fewer upper respiratory tract infections.

While the study suggests the synbiotic formula may help manage inflammatory responses to microbes and mild infections, it is important to note that the growth of the infants was similar in both groups. Because this study focused on a specific population of healthy infants, the results may not apply to all children. You should speak with a pediatrician to discuss the best nutritional options for your child.

What this means for you:

A synbiotic formula may lower inflammation and reduce respiratory infections in infants, but talk to a doctor first.

Common questions

What did the study find about infant health?

The study found that infants fed a synbiotic formula had higher levels of Bifidobacterium infantis and higher secretory IgA. These infants also showed lower markers of intestinal and systemic inflammation. Additionally, they experienced fewer upper respiratory tract infections compared to those who received the control formula.

Did the special formula affect the growth of the infants?

The study found that the growth of infants fed the synbiotic formula was not inferior to those who were fed the control formula. This means the infants in both groups grew at similar rates during the six-month study period.

Is this formula safe for all infants?

The study was conducted on 240 healthy term infants. While the results suggest the formula may dampen inflammatory responses, you should consult with a healthcare professional to determine if this specific formula is appropriate for your child's specific needs.

Study Details

Study typeRct

EvidenceLevel 2

PublishedOct 2026

View Original Abstract ↓

Formula-fed infants have altered gut microbiota and immune development relative to breastfed infants. Human milk oligosaccharides (HMOs) and microbes able to ferment these, like Bifidobacterium infantis, promote healthy immune-microbiome interactions in breastfed infants. In this randomized trial, 240 healthy term infants in the Philippines received a synbiotic blend formula (SynF; seven HMOs, bovine milk oligosaccharides, and B. infantis LMG11588) or control formula (CtrlF) for 6 months. SynF supported growth non-inferior to CtrlF and near universal B. infantis colonization (vs <10% in CtrlF). Markers of intestinal inflammation were lower in children fed SynF while secretory IgA was higher. SynF fed infants showed lower markers of systemic inflammation in plasma, slower immune cell maturation, and fewer upper respiratory tract infections (URTI) during their first 6 months of life. These findings suggest that synbiotic formula can dampen inflammatory responses to colonizing microbes and mild infections in fully formula-fed, term infants. Trial registration: NCT06073652.

Synbiotic blend formula improves B. infantis colonization and reduces inflammation in term infantsSynbiotic Formula May Reduce Inflammation and Infections in Infants

Common questions

Study Details

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Synbiotic blend formula improves B. infantis colonization and reduces inflammation in term infantsSynbiotic Formula May Reduce Inflammation and Infections in Infants

Common questions

Study Details

Evaluating Text Message Video Interventions for Improving Infant Sleep Safety Practices

Text message videos for safe sleep show mixed results

Clinical research that matters. Delivered to your inbox.

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