Breastmilk and raw milk are comparable in many aspects: both are fresh, unprocessed, and entirely natural milks. Both of them are rich in many
different vital nutrients, including lipids, proteins, digestive and anti-inflammatory enzymes, bioavailable vitamins, and minerals, all of which are
present in a natural state that the body can use most readily. Furthermore, raw milk helps the intestinal tract produce the enzyme lactase, which
makes it possible for many people who are lactose intolerant to digest raw milk without any issues.
It's also thought that raw milk has higher concentrations of "good" probiotic bacteria types, such as Lactobacillus acidophilus and Bifidobacteria.
Large studies have found that raw milk consumption is associated with lower rates of: asthma, allergies, eczema, ear infections, respiratory
infections and fevers:
1,
2,
3,
4
Allergy protection ceases when raw milk is heated to 149 °F, which is the same temperature at which the whey proteins are denatured. It is likely
that the raw whey proteins are responsible for raw milk’s beneficial effects on allergies, asthma, and inflammation.
Loss of allergy-protective capacity of raw cow's milk after heat treatment coincides with loss of
immunologically active whey proteins
Childhood consumption of raw milk correlates with higher pulmonary (lung) function and lower incidence of allergic diseases in adults.
Raw Milk Consumption and Other Early-life Farm Exposures and Adult Pulmonary Function in
the Agricultural Lung Health Study
Raw milk’s beneficial effects on asthma are partially mediated by regulatory T cells.
A switch in regulatory T cells through farm exposure during immune maturation in childhood
Benefits of raw milk are independent of the environment, such that these benefits are observed in both farm and urban settings.
The Beneficial Effect of Farm Milk Consumption on Asthma, Allergies, and Infections: From Meta-Analysis
of Evidence to Clinical Trial
Consumption of farm milk during first year of life significantly inversely associated with asthma, hay fever, and atopy, independent of other farm
exposures.
Exposure to farming in early life and development of asthma and allergy: a cross-sectional
survey
There is evidence that gene expression of innate immunity receptors is upregulated by farming-related exposures such as raw milk.
Prenatal and early-life exposures alter expression of innate immunity genes: the PASTURE cohort
study/url]
Farm milk consumption contributes to modulating immune reaction toward Th1/Treg predominance, involving epigenetic changes. Early exposure, especially
in utero, gives stronger effect than later exposure; gives long lasting lower risk of atopic diseases.
[url=https://pubmed.ncbi.nlm.nih.gov/22306551/]Lesson from the farm environment
Consumption of unprocessed cow's milk, along with exposure to animals, is major relevant farm exposure. Heat-sensitive components such as whey
proteins or microRNAs, and native fat composition likely more important than bacterial content for asthma protection. Strongest protection due to
exposure in utero or during infancy. Consumption of raw but not heated farm milk during first year also associated with less rhinitis and otitis
media.
The microbial environment and its influence on asthma prevention in early life
Human IgA in breastmilk protects newborns against pathogens, and promotes establishment and maintenance of intestinal homeostasis. Bovine milk IgA may
provide similar benefits, but milk processing destroys antibody activity.
Immunoglobulin A in Bovine Milk: A Potential Functional Food?
Milk proteins, cytokines, immunoglobulins, fatty acids, lactose, oligosaccharides and microbes could all contribute to: inducing adaptive immune
response, creating microenvironment favorable to Treg development, modulating microbiota and supporting intestinal barrier function.
Which factors in raw cow's milk contribute to protection against allergies?