Raw Milk: Benefits, Risks, and Safety Concerns Explained

Milk has been a staple of the human diet for thousands of years. But a growing conversation around food naturalness, farm-sourced produce, and traditional eating habits has brought raw milk back into focus. Some people swear by its taste and claimed health benefits. Others, including public health authorities, urge considerable caution.

So what exactly is raw milk, what does the science actually say about it, and is it safe to consume? Here is a clear, balanced look at everything you need to know.

What Is Raw Milk?

Raw milk is milk from any dairy-producing animal, most commonly cows, but also goats, sheep, buffalo, or camels, that has not been pasteurised, homogenised, or otherwise heat-treated. It is milk in its most natural, unprocessed state, as it comes directly from the animal.

Before pasteurisation became standard practice in the early to mid-twentieth century, all milk consumed by humans was raw. The introduction of pasteurisation was a direct public health response to widespread illness and deaths caused by contaminated dairy, particularly bovine tuberculosis, which was responsible for tens of thousands of deaths in the United States and Europe over a 25-year period.

Today, raw milk remains legal in some regions under specific conditions but is banned or heavily restricted in many countries, including Australia, Canada, and Scotland, due to the health risks it carries.

The Pasteurisation Process

Pasteurisation involves heating milk to a specific temperature for a set period of time to kill harmful bacteria, yeasts, and moulds. It also extends the shelf life of milk significantly.

The most common method used today is High Temperature Short Time (HTST) pasteurisation, which heats milk to at least 72 degrees Celsius for 15 seconds. A slower method involves heating to 63 degrees Celsius for 30 minutes. Ultra-heat treatment (UHT), used widely in Europe, heats milk to 135 degrees Celsius for a few seconds, extending shelf life to several months even without refrigeration.

Pasteurisation does not alter the fundamental nature of milk. It is not a chemical process and does not add any substances to the milk. It simply eliminates the microbial threats that can make milk dangerous to consume.

Raw Milk vs Pasteurised Milk

Raw Milk and Nutritional Value

One of the most common arguments in favour of raw milk is that pasteurisation destroys its nutritional value. This claim does not hold up well under scientific scrutiny.

An extensive review of 40 studies found only very minor reductions in certain water-soluble vitamins, particularly B1, B6, B9, B12, and C, following pasteurisation. Given that milk is already a relatively modest source of these vitamins, and that they are widely available in fruits, vegetables, and whole grains, these losses are considered nutritionally insignificant.

Fat-soluble vitamins A, D, E, and K also see minimal reduction during pasteurisation. The minerals calcium and phosphorus, two of milk's most important nutritional contributions, are highly heat-stable and remain essentially unchanged.

Protein content is similarly unaffected in any meaningful way. Studies comparing raw, pasteurised, and UHT milk found that the proteins from pasteurised milk had the same biological activity in the body as those from raw milk.

The bottom line on nutrition is straightforward: raw and pasteurised milk are nutritionally comparable. The heat treatment required to make milk safe does not come at a significant nutritional cost.

Claimed Benefits of Raw Milk: What Does the Science Say?

Proponents of raw milk make several health claims. It is worth looking at each of them honestly, because misinformation in this area can have serious consequences.

• Better nutrition: As discussed above, the nutritional differences between raw and pasteurised milk are minimal and not clinically significant. Choosing raw milk for nutritional reasons is not supported by evidence.
• More antimicrobials: Raw milk does contain a range of natural antimicrobial compounds, including lactoferrin, immunoglobulin, and lactoperoxidase. Pasteurisation reduces the activity of some of these compounds, though most remain largely intact. However, these antimicrobials do not protect you from the harmful pathogens that raw milk may carry.
• Allergy and asthma protection: Some observational studies, particularly in European children living on farms, found an association between farm milk consumption and lower rates of allergic conditions. However, researchers have consistently noted that the protective effect appears to be linked to the farm environment itself, with its diverse microbial exposure, rather than to the raw milk specifically. No clinical evidence establishes a direct causal link between raw milk consumption and protection from allergies or asthma.
• Lactose intolerance relief: Both raw and pasteurised milk contain similar amounts of lactose. While raw milk does contain Lactobacillus bacteria that theoretically produce the lactase enzyme, a controlled study in adults with self-reported lactose intolerance found no difference in digestive symptoms between those drinking raw milk and those drinking pasteurised milk. Raw milk does not cure or alleviate lactose intolerance.
• Probiotic benefits: Probiotics are defined as beneficial live microorganisms that, when consumed in adequate amounts, confer a health benefit. Raw milk does not meet this definition. It does not contain recognised probiotic strains in amounts that would provide a health benefit. Probiotics are more reliably found in fermented dairy products such as yoghurt and kefir, both of which can be made from pasteurised milk.
• Skin health: There is no clinical evidence that drinking raw milk produces any specific benefit for skin health that is not achievable through a balanced diet and proper hydration. Applying raw milk topically, a practice that has some traditional precedent, also carries risks given the bacterial contamination it may contain.
• Weight management: There is no scientific evidence that raw milk has any specific advantage over pasteurised milk for weight management. Both contain similar calorie and macronutrient profiles.
• Stronger immune system: While milk contains immune-active compounds, the claim that raw milk specifically boosts immunity in a clinically meaningful way is not supported by robust evidence.
• Better taste: This is subjective, and some people genuinely prefer the taste of raw milk. Taste preference, however, is not a health reason.
• More natural: Being unprocessed does not automatically mean safer or healthier. Many natural substances carry significant health risks. The naturalness of a food does not determine its safety.

Turmeric Milk Benefits For Immunity Boost and How to Make It

Is Raw Milk Safe to Drink?

This is where the evidence becomes particularly clear and where public health guidance is unambiguous.

Raw milk is one of the riskiest foods a person can consume. The reason is simple: milk exits the animal in a sterile state, but from the moment of milking, it is exposed to potential contamination from the animal's udder, skin, faeces, milking equipment, transport containers, and storage environments. Contamination is invisible to the naked eye and often undetectable until bacterial growth becomes significant.

Harmful bacteria and pathogens that can be present in raw milk include Salmonella, Escherichia coli (E. coli), Listeria monocytogenes, Campylobacter, Cryptosporidium, Staphylococcus aureus, and Yersinia enterocolitica. These can cause serious foodborne illness even in healthy adults.

Emerging research has also found that raw milk can carry viruses including H5N1 avian influenza. Pasteurisation effectively kills this virus, but consuming raw milk from infected animals carries a risk of transmission.

It is also important to note that a recent study found that antivirals available to treat bird flu are less effective when the virus is contracted orally through contaminated food or drink, which further strengthens the case for not consuming raw milk.

Research analysing 20 years of foodborne illness data linked 202 outbreaks and over 2,600 illnesses to raw milk in the United States alone. Of these, over 200 required hospitalisation, and three people died. More recent analysis found that raw milk and raw milk products cause significantly more illnesses and hospitalisations per litre consumed compared to pasteurised dairy, despite raw milk accounting for only a small fraction of total dairy consumption.

Raw Milk Risks and Side Effects

The health risks associated with raw milk consumption are well-documented and significant.

• Bacterial infections: Pathogens in raw milk can cause severe gastrointestinal illness with symptoms including vomiting, diarrhoea, stomach cramps, fever, and blood in the stool.
• Serious complications: Beyond acute illness, raw milk infections can lead to reactive arthritis, haemolytic uraemic syndrome (a form of kidney failure), Guillain-Barre syndrome, and chronic inflammatory conditions.
• Risk of miscarriage: Listeria contamination in raw milk poses a particularly serious threat during pregnancy and has been associated with miscarriage, stillbirth, and severe illness in newborns.
• Death: Though rare, deaths from raw milk consumption have been documented. Those infected by raw milk are significantly more likely to require hospitalisation than those infected through pasteurised dairy.
• Disproportionate illness burden: Despite being consumed by a small percentage of the population, raw milk accounts for a vastly disproportionate share of all dairy-related foodborne illness outbreaks.
• Emerging viral threats: Raw milk can harbour viruses including H5N1, for which current antiviral treatments have reduced effectiveness when the virus is ingested.
• Contamination from healthy animals: Critically, animals that appear completely healthy can still produce contaminated milk. There is no way to assess the safety of raw milk by looking at the animal or the milk itself.

Who Is Most at Risk From Raw Milk?

While anyone can fall ill from drinking contaminated raw milk, certain groups face a significantly higher risk of severe complications.

• Pregnant women: Listeria infection during pregnancy can cause miscarriage, premature labour, and life-threatening illness in the newborn.
• Infants and young children: Their immune systems are not yet fully developed, making them highly vulnerable to severe infection. More than half of all raw milk disease outbreaks have involved at least one child under five years of age.
• Elderly individuals: Age-related changes in immune function increase the risk of severe illness and complications.
• People with weakened immune systems: This includes those managing conditions such as diabetes, HIV, cancer, or autoimmune diseases, as well as those on immunosuppressive medication.

If you fall into any of these groups, all major health authorities strongly advise avoiding raw milk and raw milk products entirely.

Frequently Asked Questions

Can Raw Milk Be Used for Cooking?

Cooking raw milk to a sufficient temperature, above 72 degrees Celsius for at least 15 seconds, would kill most harmful bacteria, effectively pasteurising it in the process. However, this defeats the purpose of using raw milk if the appeal is its unprocessed nature. For cooking purposes, pasteurised milk is equally suited for all culinary applications and does not carry the safety risks associated with raw milk, particularly if the dish is not fully cooked through.

Is Raw Milk Safe for Babies?

No. Raw milk is particularly dangerous for infants and young children. Their immune systems are still developing and cannot effectively fight off the bacterial and viral pathogens that raw milk may contain. Health authorities including the WHO and the FDA explicitly advise against giving raw milk to infants or young children. Breast milk remains the optimal choice for young infants, and any questions about infant nutrition should be directed to a paediatrician.

Should I Drink Raw Milk Every Day?

Given the documented risks and the lack of evidence supporting meaningful health benefits over pasteurised milk, daily consumption of raw milk is not advisable. Public health bodies worldwide, including the WHO and the FDA, recommend against consuming raw milk. A balanced diet that includes pasteurised dairy, a wide range of fruits and vegetables, whole grains, and adequate protein provides all the nutritional benefit that milk can offer, without the associated risks.

Is Raw Milk Good for Your Skin?

There is no robust clinical evidence that drinking raw milk provides specific skin benefits beyond what a generally healthy, nutrient-rich diet would provide. Some traditional practices involve applying milk topically to the skin, but using raw milk in this way also carries a contamination risk. If skin health is a concern, speaking with a dermatologist about evidence-based skincare approaches is a more reliable path forward.

Can Raw Milk Be Consumed Warm?

Warming raw milk does not make it safer unless it is heated to pasteurisation temperatures, which means raising the temperature to at least 72 degrees Celsius for a minimum of 15 seconds. Warming raw milk to a comfortable drinking temperature does not eliminate harmful pathogens and may in fact create a warmer environment that is more conducive to bacterial growth.

How Does Raw Milk Affect Digestion?

Despite claims that raw milk is easier to digest, particularly for those with lactose intolerance, the evidence does not support this. Controlled studies have found no difference in digestive symptoms between people drinking raw and pasteurised milk. Both contain comparable amounts of lactose. If you experience digestive discomfort after consuming dairy, lactose-free pasteurised milk, fermented dairy products such as yoghurt, or plant-based alternatives are better-evidenced options to explore.

Who Should Avoid Raw Milk?

Anyone who is pregnant, elderly, immunocompromised, or has an underlying health condition should avoid raw milk entirely. Infants and young children should also not consume it. In practice, given the documented risks and the lack of evidence for meaningful benefits over pasteurised milk, most health authorities advise all consumers to avoid raw milk regardless of their health status.

How Do You Choose Milk Safely?

When choosing milk, opt for pasteurised products from reputable, regulated sources. Check that the packaging is clearly labelled as pasteurised, that the seal is intact, and that the product is within its use-by date. Store milk in the refrigerator at or below 4 degrees Celsius and consume within the recommended period after opening. For speciality milks such as plant-based alternatives, check for fortification with calcium and vitamin D to ensure you are not missing key nutrients.

What Does Raw Milk Taste Like?

Many people who drink raw milk describe it as having a richer, creamier taste than pasteurised milk, with a slightly different flavour profile that some associate with the animal's breed and diet. Taste is subjective, and while some people prefer it, taste preference is not a reason to accept the health risks that raw milk carries.

How Long Can Raw Milk Be Stored?

Raw milk has a very short shelf life, typically two to four days when refrigerated at the correct temperature. Because it has not been pasteurised, the bacteria present in raw milk, both harmful and benign, continue to multiply even under refrigeration, causing it to sour and spoil rapidly. Pasteurised milk, by contrast, typically remains fresh for two to three weeks. UHT-treated milk can remain shelf-stable for several months before opening.

Stay Informed About Your Health With Metropolis Healthcare

Making well-informed food choices is one of the most powerful things you can do for your health. Whether you are rethinking what you eat, managing a health condition, or simply curious about how your diet affects your body, understanding the evidence matters.

Routine health monitoring can give you a clear picture of how your lifestyle choices, including your diet, are affecting your health markers, from nutrient levels and gut health to immune function and inflammation. Metropolis Healthcare offers over 4,000 tests, including comprehensive nutritional panels, full body checkups, and speciality diagnostic tests designed to give you accurate, reliable insight into your health.

With NABL and CAP-accredited laboratories, expert pathologists, and a strong home sample collection network spanning over 10,000 touchpoints across India, Metropolis makes proactive health screening simple and accessible. You can book tests easily through the website, app, call, or WhatsApp. Because staying healthy is not just about the choices you make at the table, it is also about knowing what is happening inside your body.

References

1. Lucey JA. Raw milk consumption: risks and benefits. Nutr Today. 2015;50(4):189-193. PMID: 26275770.
2. Costard S, Espejo L, Groenendaal H, Zagmutt FJ. Outbreak-related disease burden associated with consumption of unpasteurized cow's milk and cheese, United States, 2009-2014. Emerg Infect Dis. 2017;23(6):957-964. PMID: 28516869.
3. Oliver SP, Jayarao BM, Almeida RA. Foodborne pathogens in milk and the dairy farm environment: food safety and public health implications. Foodborne Pathog Dis. 2005;2(2):115-129. PMID: 15992306.
4. Macdonald LE, Brett J, Kelton D, Majowicz SE, Snedeker K, Sargeant JM. A systematic review and meta-analysis of the effects of pasteurization on milk vitamins, and evidence for raw milk consumption and other health-related outcomes. J Food Prot. 2011;74(11):1814-1832. PMID: 22054181.
5. Perkin MR, Strachan DP. Which aspects of the farming lifestyle explain the inverse association with childhood allergy? J Allergy Clin Immunol. 2006;117(6):1374-1381. PMID: 16750997.
6. Mungai EA, Behravesh CB, Gould LH. Increased outbreaks associated with nonpasteurized milk, United States, 2007-2012. Emerg Infect Dis. 2015;21(1):119-122. PMID: 25529565.
7. World Health Organization. Food safety: milk hygiene and pasteurisation. WHO Technical Guidelines. Geneva.
8. Murugkar HV, Rahman H, Kumar A, Bhatt P. Isolation, characterization and pathogenicity of H5N1 avian influenza viruses from India. Vet Microbiol. 2006;114(3-4):153-159. PMID: 16324793.