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Updated: May 28, 2026

Probiotic Studies in Neonatal Mice Using Gavage
Published on: January 27, 2019
Short- and long-term effects of probiotics administered early in life
1Department of Pediatrics, The Medical University of Warsaw, Warsaw, Poland.
Insights
Administering probiotics to infants may alter their gut microbiota, potentially preventing later-life diseases. However, long-term effects and optimal timing require further investigation.
Area of Science:
- Microbiology
- Immunology
- Pediatrics
Background:
- Early-life gut microbiota development is crucial for long-term health.
- Probiotics are increasingly administered to infants to modulate gut microbiota.
- The long-term consequences of early probiotic administration are not fully understood.
Purpose of the Study:
- To evaluate the concept of manipulating infant gut microbiota with probiotics.
- To identify potential benefits and risks associated with early-life probiotic use.
- To highlight areas requiring further research regarding long-term health outcomes.
Main Methods:
- Review of current scientific literature on early-life probiotic administration.
- Analysis of factors including timing, duration, and delivery methods (e.g., infant formula).
- Consideration of observed beneficial and detrimental effects years after administration.
Main Results:
- Probiotic administration in early life is appealing for disease prevention.
- Concerns exist regarding the timing (infancy, birth) and duration (weeks/months) of administration.
- Long-term effects, including potential immunosuppression, warrant careful evaluation.
Conclusions:
- While promising data exist, more research is needed to answer questions about long-term effects.
- Cautious evaluation of long-term consequences is essential.
- Rapid advancements in this research area are anticipated.
Abstract:
The concept of manipulating the gut microbiota through the administration of probiotics during early life in order to reduce the risk of and prevent or treat diseases, including those that manifest in later life, is appealing. However, a cautious approach is needed, and the long-term consequences of such administration should be carefully evaluated. Concerns related to the early administration of probiotics include timing, i.e. the administration often begins in early infancy, sometimes at birth, when gut microbiota is not fully established, and duration, i.e. the daily administration of such products is prolonged (several weeks or months). In the case of non-breastfed infants, delivery may be in the form of a specific matrix (infant formula) that could be the only source of feeding of an infant over a prolonged period. Finally, the fact that beneficial as well as some detrimental effects are seen years after administration of probiotics during the first months of life raises concern that other long-term effects such as immunosuppression in later life may also occur. Currently, while some promising data exist, there are still more questions than answers. However, rapid progress in this area of research is expected and no doubt will bring about a number of exciting findings.
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