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Breast milk provides the immune support infants need in their first year of life1–3

The first year of life is a critical time for immune system development4,5

Initial immune protection provided by maternal antibodies declines rapidly after birth4,5

illustration-mom-baby illustration-mom-baby-m

What are the factors that influence early immune development?

Several factors can influence the development of an infant's immune system, from antibiotics intake during pregnancy and infancy and the mode of delivery, to the natural source of microbes in the environment.6 Discover more information on how immunity is transferred from mother to infant.

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Breast milk contains several factors which help infants build their own immune system after birth:3

protein-signalsImmune signalling proteins

  • Cytokines (e.g. IL-1β, IL-5, IL-13)
  • Growth factors (e.g. epidermal growth factor, vascular endothelial growth factor)
  • Immunoglobulins (e.g. IgA, IgG, IgM)

immune-cellsImmune cells

  • Lymphocytes
  • Macrophages
  • Granulocytes

human-milkHuman milk oligosaccharides

  • Short- to medium-chain carbohydrates, e.g. 2’-fucosyllactose (2’-FL), the most abundant HMO in most mothers’ milk7

Find out how the third most abundant solid component of breast milk can support the immune system.

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IMPORTANT NOTICE: Breastfeeding is best for infants and is recommended for as long as possible during infancy.

*Data from infants with CMA or suspected CMA (n=200) and infants who did not have CMA (n=200) and who were exclusively formula fed. Data from the first 12 months of life were collected through general practitioners; GPs did not indicate whether illness occurred before or after diagnosis.
Number of hospital admittances (does not have to include an overnight stay) related to skin, respiratory, and gastrointestinal disorders in the past 12 months.
Mean number of total GP appointments for medical issues related to skin, respiratory, and gastrointestinal disorders in the past 12 months.
§Number of attendances at A&E or out-of-hours urgent care related to skin, respiratory, and gastrointestinal disorders in the past 12 months.

2’-FL: 2’-fucosyllactose; CMA: cow’s milk allergy; GI: gastrointestinal; HMO: human milk oligosaccharide; IgA: immunoglobulin A; IgM: immunoglobulin M; IL: interleukin; TNF: tumour necrosis factor; WHO: World Health Organization.

References