There is a popular belief that consuming raw milk or raw milk products is a healthier option, in contrast to consuming pasteurized milk or milk products. There exists a lot of misconceptions about pasteurization, with some suggesting it leads to loss of essential nutrients while others accuse pasteurization as an artificial or ‘unnatural’ processing of milk that risks spoiling the product.
However, scientific studies have found all such allegations to be unfounded. But what is more disconcerting is that scientific evidences suggest consuming raw milk or raw milk products poses definite health threats for us and that pasteurization of milk is critical before it is consumed.
Some critical scientific evidences from across the world suggest:
It is true that the heating process during pasteurization affects some nutrients in raw milk; viz thiamine, vitamin B6 and folic acid within the B-complex, and vitamin C. However, our present diet ensures these nutrients are received from other sources and hence missing them in milk products does not affect us much.
In contrast, raw milk or raw milk products have a higher content probability for harmful germs like Brucella, Campylobacter, Cryptosporidium, E. coli, Listeria, and Salmonella. Between 1993 till 2012, the Centers for Disease Control and Prevention (CDC) in the USA reported 127 outbreaks of diseases due to raw milk, which includes 1,909 illnesses and 144 hospitalizations.
Scientists at UC Davis have discovered that unrefrigerated milk, often done intentionally to allow it to ferment to produce clabber actually leads to these bacteria developing anti-microbial resistance genes which then makes them immune to antibiotic medicines.
The gastrointestinal tract in humans in modern times are often not able to digest certain components which we could earlier; or resist certain types of bacterial infections. A major factor in this development has been the advances made in medicines and how the human digestive system has evolved with these advances. Thus, the gastrointestinal tracts of infants and young children, older adults, pregnant women, and people with weakened immune systems such as people with cancer, an organ transplant, are unable to face the challenges of the different types of bacteria present in raw milk. While most healthy people can recover from an illness caused by harmful bacteria in raw milk products, there always exists the risk that some may develop symptoms that are chronic, severe, or even life-threatening.
A big form of risk stems from raw milk products like cheese, with a new-found customer preference for hand-made cheese or what is known as artisan cheese. Often these are part of ‘back to nature’ products, where the milk and cheese are produced in ‘organic farms’ with pasteurization. While handmade cheese from pasteurized milk is not a concern, such products from unpasteurized milk risk contamination (animal feces, dirt), cow diseases (mastitis, bovine tuberculosis), cross-contamination from dairy workers, etc that raises the risk of harmful elements in the raw milk thus produced.
It is therefore always advisable to consume only pasteurized milk and milk products.