Raw cheese offers a wider variety of beneficial bacteria and more complex flavor than pasteurized cheese, and there’s reasonable evidence that unprocessed dairy may offer some immune-related benefits. But the nutritional gap between raw and pasteurized cheese is smaller than many advocates claim, particularly when it comes to minerals and certain fats. Here’s what actually holds up when you look at the science.
A Much Richer Bacterial Community
The biggest genuine advantage of raw cheese is its microbial diversity. Raw milk naturally contains a broad community of bacteria, including Lactococcus, Leuconostoc, Enterococcus, Streptococcus, and several other genera that play key roles during aging. Pasteurization kills most of these organisms. Cheesemakers then add back a handful of starter cultures, but the result is a far simpler microbial ecosystem compared to what raw milk provides on its own.
Lactococcus lactis is the species most commonly found in raw milk and dairy products, and its subspecies are widely used as starter cultures. But in raw cheese, these bacteria arrive alongside dozens of other strains that contribute to ripening, flavor complexity, and the production of compounds that may benefit your gut. The lactic acid bacteria in raw cheese have been studied for probiotic functions including antimicrobial activity and immune modulation, though the extent of those benefits in your digestive system depends on whether enough live bacteria survive the journey through stomach acid.
Flavor Differences Are Real
Raw milk cheese is consistently described in food science literature as having a richer, more distinctive flavor than its pasteurized counterpart. This isn’t subjective nostalgia. The diverse bacterial community in raw milk produces a wider range of enzymes during aging, which break down proteins and fats into aromatic compounds that pasteurized-milk cheese simply can’t replicate with a limited set of added cultures. If you’ve ever compared a raw-milk cheddar or Gruyère to a pasteurized version of the same style, the difference in depth and complexity is noticeable.
The Mineral and Fat Claims Don’t Hold Up
One of the most common claims about raw cheese is that it contains more bioavailable calcium and other minerals. Multiple studies, including both lab and animal research, have found no difference in calcium concentration or bioavailability between raw and pasteurized milk. Phosphorus and sodium absorption are also unaffected. Minerals are stable under pasteurization temperatures, so this particular argument for raw cheese doesn’t have scientific support.
Conjugated linoleic acid (CLA), a fat that has drawn interest for potential anti-inflammatory and metabolic benefits, shows a similar pattern. Measurements of CLA in raw-milk cheeses averaged about 10.8 mg per gram of fat, while pasteurized-milk cheeses came in around 9.6 mg per gram. That difference was not statistically significant. Individual cheeses varied far more based on the animal’s diet and breed than on whether the milk was pasteurized. One raw-milk cheese tested at 17.27 mg/g while another came in at just 8.61 mg/g, a range that dwarfs any pasteurization effect.
Bioactive Peptides in Aged Cheese
As cheese ages, bacterial enzymes break milk proteins into smaller fragments called bioactive peptides. These peptides have been studied for a range of effects: lowering blood pressure by blocking an enzyme that constricts blood vessels, supporting immune function, fighting harmful microbes, and acting as antioxidants. Both raw and pasteurized cheeses produce bioactive peptides during aging, but the greater diversity of enzymes in raw cheese may generate a wider variety of them.
The blood pressure connection is particularly well-studied. Fragments of casein, the main protein in milk, can inhibit the same enzyme that a common class of blood pressure medications targets. These peptide fragments have been identified in cheeses made from cow, sheep, and goat milk. Whether you get enough of them from a normal serving of cheese to meaningfully affect your blood pressure is less clear, but the mechanism is well established in lab settings.
Possible Protection Against Allergies and Asthma
Some of the most intriguing research on raw dairy involves its relationship with allergic conditions. A meta-analysis covering 12 publications found consistent protective effects of raw milk consumption against asthma in both farm and non-farm children. Over 90% of epidemiological studies worldwide have reported a protective association between unprocessed cow’s milk and the development of asthma, hay fever, and allergic sensitization.
Animal studies help explain why heat matters. When researchers gradually increased milk heating temperatures from 50°C to 80°C, allergic responses appeared above 60°C, which is right around pasteurization temperature. In an asthma mouse model, raw milk essentially prevented asthma-like reactions, while heated milk (80°C) still had some effect but was significantly less protective. Something in the milk’s native proteins or other heat-sensitive components appears to train the immune system toward tolerance rather than overreaction. Most of this research involves raw milk rather than raw cheese specifically, but the heat-sensitive compounds would be preserved in cheese made from unheated milk.
Lactose Is Low in Most Aged Cheese
If you’re lactose intolerant, you may have heard that raw cheese is easier to digest. There’s a kernel of truth here, but it’s not unique to raw cheese. During cheesemaking, bacteria convert lactose into lactic acid. By the time a cheese has been aged for weeks or months, most of the lactose is gone regardless of whether the milk started out raw or pasteurized. The bacterial starter cultures do this work in both types of cheese.
Where raw cheese might offer a slight edge is that its more diverse bacterial population could continue breaking down residual lactose during aging. But the practical difference for most people is small. Hard, aged cheeses like Parmesan, aged cheddar, and Gruyère are naturally very low in lactose whether they’re made from raw or pasteurized milk.
Safety and the 60-Day Rule
In the United States, cheese made from raw milk must be aged for a minimum of 60 days before it can be sold. This rule exists because the combination of salt, acidity, low moisture, and time creates an environment hostile to most pathogens. The FDA actively surveys aged raw cheese for safety, collecting hundreds of samples annually for testing.
The risk picture is more nuanced than either side of the debate suggests. A systematic review of dairy-related outbreaks in Canada and the U.S. from 2007 onward found 20 outbreaks linked to unpasteurized dairy products, resulting in 449 confirmed illnesses, 124 hospitalizations, and 5 deaths. But pasteurized products weren’t risk-free either: 12 outbreaks caused 174 confirmed illnesses, 134 hospitalizations, and 17 deaths plus 7 fetal losses. The pasteurized outbreaks involved fewer total cases but had a higher severity rate, partly because they were dominated by a particularly dangerous type of bacteria found in soft cheeses. Soft raw-milk cheeses, which can’t be legally sold in the U.S. because they don’t meet the 60-day aging requirement, carry more risk than hard aged varieties.
Young children, pregnant women, older adults, and anyone with a weakened immune system face higher risk from any unpasteurized dairy product. For healthy adults eating properly aged raw cheese from a reputable producer, the risk is low but not zero.
What Actually Makes the Difference
The strongest case for raw cheese rests on its bacterial diversity, its superior flavor complexity, and the emerging (though still developing) evidence around immune tolerance and allergy protection. The weakest claims involve minerals and most fat-soluble nutrients, which survive pasteurization just fine. If you’re choosing raw cheese primarily for gut health, look for varieties that have been aged long enough to develop complex flavors but not so long that the bacterial population has declined significantly. Semi-hard cheeses aged 2 to 6 months tend to hit that sweet spot. And the quality of the milk matters enormously: cheese made from grass-fed animals on small farms will differ from industrial raw-milk cheese in ways that have nothing to do with pasteurization and everything to do with what the animals ate.