Immune system Quote by Ed Yong
““It earns its keep. As it digests HMOs, B. infantis releases short-chain fatty acids (SCFAs) that feed an infant's gut cells - so while mothers nourish this microbe, the microbe in turn nourishes the baby. Through direct contact, B. Infantis also encourages gut cells to make adhesive proteins that seal the gaps between them, and anti-inflammatory molecules that calibrate the immune system. These changes only happen when B. infantis grows on HMOs; if it gets lactose instead, it survives but doesn't engage in any repartee with the baby's cells. It unlocks its full beneficial potential only when it feeds on breast milk. Likewise, for a child to reap the full benefits that milk can provide, B. infantis must be present. For that reason, David Mills, a microbiologist who works with German, actually sees B. infantis as part of milk, albeit a part that is not made in the breast.””
About This Quote
Source Article: The New York Times, “The Secret Life of Breast Milk” by Ed Yong, 2023
Bifidobacterium infantis thrives on human milk oligosaccharides, producing metabolites that strengthen the infant gut barrier and modulate immunity, creating a mutualistic relationship that depends on the presence of this microbe.
In simple terms: The bacteria in breast milk help baby gut health, but only if the right bacteria are there.
Key Takeaway
Ensure infant gut isisis present for optimal milk benefits.
Themes
nutrition
microbiology
infant health
mutualism
immunity
Mood
informative
hopeful
Type
scientific
educational
When to use this quote
- breastfeeding
- probiotic supplementation
- infant formula development
- clinical research on gut microbiome
- maternal diet choices
Key Concepts
human milk oligosaccharides
short chain fatty acids
adhesive proteins
immune calibration
Questions to Reflect On
- How can we support colonization of B. infantis in newborns?
- What alternatives exist when this bacterium is missing?
A Different Perspective
If B. infantis is absent, breast milk alone cannot deliver its full protective effects.
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