Is raw milk more nutritious and healthful than pasteurized milk?
Claim attributed to Raw-milk advocates and ancestral-diet and wellness influencers , Promoted by the Weston A. Price Foundation and the Raw Milk Institute and by ancestral-diet and wellness influencers.
Pasteurization leaves milk's nutrition essentially intact while removing a real, quantified infection hazard. The "more nutritious, easier to digest, benefits outweigh risks" framing inverts the evidence, so it reads as misleading rather than merely unproven.
Raw milk is about as nutritious as pasteurized, the one trial of its digestion claim found nothing, and the infection risk it adds is real and measured.
What it’s supposed to target
- Pasteurization (pathogen kill)
- Nutrient retention
- Foodborne pathogens
- “Living enzymes” claim
Pasteurization gently heats milk to kill disease-causing microbes. Raw-milk advocates argue this heat also destroys beneficial enzymes, “good” bacteria, and nutrients, and that unprocessed milk is therefore more nutritious and even eases allergies or lactose intolerance. The theory leans on an “unprocessed equals healthier” intuition and on the idea that heat-sensitive components are lost.
The nutrition half does not hold: pasteurization leaves protein, calcium, and most vitamins essentially intact, with only trivial losses of a few heat-labile vitamins that milk is not a key source of anyway, and a randomized trial found no difference in lactose-intolerance symptoms between raw and pasteurized milk. The risk half, however, is real and serious: raw milk causes a far higher rate of foodborne illness per serving (Listeria, E. coli O157:H7, Salmonella, Campylobacter), with the worst danger to children, pregnant people, and the elderly. Near-identical nutrition, meaningfully higher risk: the trade runs the wrong way.
Mechanism is theory, not proof. A plausible pathway explains why something might work, not whether it does. The verdict rests on the evidence below, not the elegance of the theory.
What would have to be true
Pasteurization would have to meaningfully strip milk's nutrients (it does not: protein, calcium and most vitamins are heat-stable).
Raw milk would need a real digestion mechanism (it has none; milk contains no human lactase and pasteurization leaves lactose unchanged).
A demonstrated benefit would have to outweigh the documented pathogen risk (no such benefit exists, while the risk is well quantified).
What the evidence actually shows
Nutrition is essentially equivalent
The claim that heat "destroys" milk's value does not survive contact with the data. A systematic review and meta-analysis (Macdonald 2011, *Journal of Food Protection*) found pasteurization significantly lowers only some heat-labile vitamins (B1, B2, C, folate), but concluded the effect on milk's overall nutritive value was minimal because most are present in low amounts (the review flagged riboflavin/B2 as a partial exception, though the loss is modest and pasteurized milk stays a good B2 source). The AAP states raw and pasteurized milk "contain the same amount of nutrients," including the same proteins and lactose that can trigger reactions. Protein, calcium and most vitamins are heat-stable and survive intact.
The risk is real; the digestion benefit is not
A peer-reviewed CDC risk model (Costard 2017, *Emerging Infectious Diseases*) estimated unpasteurized dairy causes 840 times (95% CrI 611-1,158) more illnesses and 45 times more hospitalizations per unit consumed than pasteurized dairy, with raw products causing about 96% of dairy-outbreak illnesses. Pathogens include Listeria, Shiga-toxin *E. coli*, Salmonella and Campylobacter. On digestion, a blinded crossover RCT (Mummah 2014) in 16 lactose-intolerant adults found no difference between raw and pasteurized milk on breath testing or symptoms; the senior author reported "no hint of any benefit."
Studies, graded, and who paid
Regulators and a meta-analysis agree key nutrients are heat-stable; only minor vitamins drop (B2 is a partial exception, but the loss is modest).
A blinded crossover RCT found no difference versus pasteurized milk; milk contains no human lactase, so there is no mechanism.
A CDC risk model puts excess illness far higher for unpasteurized dairy; no demonstrated benefit offsets it.
| # | Study | Type | Size | Funding / COI | Key limitations |
|---|---|---|---|---|---|
| 1 | Costard 2017, CDC outbreak risk model | Quantitative outbreak risk model (national surveillance) | U.S. outbreak data, 2009-2014 | Independent USDA grant plus Pennsylvania Agricultural Experiment Station; public/academic, no industry money. Finding is unfavorable to raw milk. | 840x is a modeled per-unit rate ratio with a wide credible interval, not a direct headcount; the large-excess-risk conclusion is solid. |
| 2 | Mummah 2014, raw milk and lactose intolerance RCT | Randomized, blinded crossover pilot trial | n=16 adults with confirmed lactose malabsorption | Industry-funded Funded in part by the Weston A. Price Foundation, a pro-raw-milk group; a null result from a friendly funder is especially credible. | Small pilot (n=16); blinded design and funder direction make the null persuasive. |
| 3 | Macdonald 2011, pasteurization and milk vitamins meta-analysis | Systematic review and meta-analysis | Pooled across multiple primary studies | Independent Canadian Institutes of Health Research (public); not industry-funded. | Allergy-protection signal was observational and confounded; no support for cancer or lactose benefit. |
| 5 | AAP fact-check on raw milk | Professional society position / fact-check | Review of surveillance and literature | , Pediatric medical society; no commercial funding. | Authoritative synthesis rather than a primary study. |
A weak observational link between farm/raw-milk exposure and less childhood allergy or asthma exists, but it is confounded by general farm exposures and does not show raw milk itself is protective.
Unproven ≠ disproven
This is not a case of "untested." The headline digestion benefit was tested directly and failed, and the nutrition claim is contradicted by regulatory consensus and a meta-analysis.
Where claim and evidence diverge
No ethical RCT can assign children or pregnant people to drink raw milk given the pathogen risk, so interventional benefit data are inherently thin; the one trial that exists was null.
The money trail
The single trial of the digestion claim was paid for in part by the pro-raw-milk Weston A. Price Foundation and still found nothing, so the null cannot be blamed on anti-raw-milk bias.
The honest read
Raw milk is nutritionally about the same as pasteurized, has no proven digestion advantage, and carries a real, quantified infection risk. The benefits-outweigh-risks framing is backwards.
What would change this verdict
A well-powered, blinded RCT showing raw milk improves a meaningful health or digestion outcome versus pasteurized milk.
Evidence that pasteurization removes a nutrient milk is actually a key dietary source of, in amounts that matter.
Sources
- 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. Emerging Infectious Diseases. 2017;23(6):957-964.
- Mummah S, Oelrich B, Hope J, Vu Q, Gardner CD. Effect of Raw Milk on Lactose Intolerance: A Randomized Controlled Pilot Study. Annals of Family Medicine. 2014;12(2):134-141.
- Macdonald LE, et al. 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. Journal of Food Protection. 2011;74(11):1814-1832.
- American Academy of Pediatrics. Fact Checked: The Dangers of Drinking Raw Milk. AAP News.
People also ask
- Is raw milk more nutritious than pasteurized milk?
- No, the two are nutritionally about the same. Regulators and a meta-analysis agree the main nutrients are heat-stable; only minor vitamins drop with pasteurization (riboflavin/B2 is a partial exception, but the loss is modest and milk stays a good B2 source).
- Does raw milk help with lactose intolerance?
- No. A blinded crossover trial found no difference between raw and pasteurized milk for lactose intolerance. Milk contains no human lactase, so there is no plausible mechanism for raw milk to ease digestion.
- Do the benefits of raw milk outweigh the risks?
- No. A CDC risk model puts excess illness far higher for unpasteurized dairy, and no demonstrated benefit offsets that infection hazard. The benefits-outweigh-risks framing inverts what the evidence actually shows.
- Was the raw milk digestion study funded by skeptics?
- No, the opposite. The single trial of the digestion claim was paid for in part by the pro-raw-milk Weston A. Price Foundation and still found nothing, so the null result cannot be blamed on anti-raw-milk bias.
Part of our guide: Longevity diets, fact-checked
Caveat is journalism, not medical advice. We check public claims against published evidence; we don’t diagnose, treat, or tell you what to take.