Plant-based drinks can be healthier for some people and weaker for others; cow’s milk remains nutritionally dense, but both dairy and vegan milk are sold through marketing, lobbying, regulation and a fair amount of carton-based theatre.
The milk aisle has become a tiny refrigerated culture war. On one side sits cow’s milk, ancient, cheap, nutritionally dense and backed by decades of school schemes, dietary habits and agricultural machinery. On the other side sit oat, soya, almond, pea and coconut drinks, dressed in tasteful fonts, climate anxiety and the occasional barista moustache.
The simple question is whether vegan milk is healthier than cow’s milk. The honest answer is annoying, which means it is probably close to true: it depends on which milk, which person, which diet and which nutrient you care about.
Cow’s milk is hard to beat as a compact nutrition package. The NHS describes milk and dairy products as good sources of protein and calcium, and says they can form part of a healthy balanced diet. It also recommends choosing lower-fat and lower-sugar dairy options where possible. For people who tolerate dairy, a glass of milk brings protein, calcium, iodine, riboflavin and vitamin B12 without needing a laboratory to sneak the nutrients in through the side door. (nhs.uk)
The UK’s Scientific Advisory Committee on Nutrition and Committee on Toxicity published a major assessment of plant-based drinks in July 2025. Their conclusion was not especially flattering to the idea that every oat carton is basically milk wearing trainers. The report stated that cow’s milk is an important contributor to calcium and other micronutrients, especially riboflavin, vitamin B12 and iodine. For children aged one to five, cow’s milk is also a major contributor to energy, protein and saturated fat intake. (GOV.UK Assets)
That does not make cow’s milk a sacred fluid, despite what some dairy marketing appears to imply after being left alone with a Union Jack and a farm gate. It contains saturated fat, especially in whole milk. Harvard’s Nutrition Source notes that milk provides nutrients important for bone health, including calcium, phosphorus, vitamin D and protein, but also says a clear link between milk intake and reduced hip fractures has not been established. Translation: milk contains useful things; it is not a magic bone potion. (The Nutrition Source)
Plant-based drinks vary wildly. Soya is the serious one at the party, quietly standing near the protein table. Oat is the popular one, beloved by coffee shops and people who say “mouthfeel” without embarrassment. Almond is low-calorie but often low-protein. Coconut drink can be nutritionally thin unless fortified. Pea drinks can offer more protein, but are less culturally dominant, possibly because “pea milk” sounds like a dare.
A 2024 audit published in Nutrition Bulletin compared plant-based milks with cow’s milk and found that plant-based milks had significantly lower levels of protein, sugar, iodine, phosphorus, zinc and vitamins A, B2 and B12 compared with cow’s milk, largely because fortification rates were low. The exception was soya milk, where protein content was not significantly different from cow’s milk. (PMC)
That protein point matters. Cow’s milk generally provides complete, high-quality protein. Soya comes closest among the common plant-based drinks. Oat and almond usually do not. If someone uses a splash of oat drink in coffee, this is nutritionally close to a rounding error with vibes. If a child, older adult or person with limited dietary variety replaces several daily servings of dairy with unfortified almond drink, the fridge has just performed a small nutrient heist.
The 2025 SACN and COT assessment recommended that plant-based drinks should be fortified with vitamin A, riboflavin, vitamin B12, calcium and iodine at levels comparable with semi-skimmed cow’s milk, and also fortified with vitamin D. It said unsweetened, fortified almond, oat and soya drinks are an acceptable alternative to cow’s milk, while unfortified or sweetened plant-based drinks are not an acceptable alternative. For children aged one to five who consume animal products, the report said whole or semi-skimmed cow’s milk is preferable to plant-based drinks. (GOV.UK)
That is the scientific centre of the story: vegan milk can be a good substitute when it is fortified, unsweetened and chosen intelligently. It can be nutritionally weaker when it is unfortified, sweetened or treated as equivalent just because it has been poured over cereal with confidence.
There are people for whom dairy is a bad deal. Lactose intolerance is a common digestive problem where the body cannot digest lactose, the sugar mainly found in milk and dairy products. The NHS lists symptoms including bloating and diarrhoea. Cow’s milk allergy is different, and is one of the most common childhood food allergies. For those groups, plant-based drinks are not a wellness accessory; they are practical. (nhs.uk)
There are also ethical and environmental reasons people avoid dairy. Here the plant-based side has a much stronger case. Our World in Data, using research from Joseph Poore and Thomas Nemecek, reports that cow’s milk has significantly higher environmental impacts than plant-based alternatives across greenhouse gas emissions, land use, freshwater use and eutrophication. Cow’s milk causes around three times as much greenhouse gas emissions as plant-based alternatives and uses around ten times as much land. Almond milk complicates the victory lap because of water use, but across the main environmental metrics, plant-based drinks generally come out lighter. (Our World in Data)
So, is vegan milk healthier? For planetary health, usually yes. For saturated fat reduction, often yes, especially compared with whole milk. For lactose intolerance or milk allergy, it may be necessary. For protein, iodine, riboflavin, vitamin B12 and dependable nutrient density, cow’s milk usually wins unless the plant-based drink is well fortified, and soya is doing much of the heavy lifting.
The real absurdity is that both sides behave as if they are the lonely truth-teller being oppressed by Big Carton.
Dairy is not merely sitting there, humble and persecuted, waiting for Britain to remember calcium. The Agriculture and Horticulture Development Board says dairy levy funds support consumer marketing and reputation work, including activity to shift consumer attitudes, challenge misinformation and educate schoolchildren. In November 2025, AHDB said its “Let’s Eat Balanced” dairy campaign generated £28 in additional dairy retail sales for every £1 of levy invested, based on NIQ analysis. (ahdb.org.uk)
The state also has milk-shaped infrastructure. The UK school milk subsidy scheme subsidises the cost of milk, certain milk products and yoghurts for schoolchildren in England and Wales. Schools must offer drinking milk before they can supply other eligible milk products or yoghurts. The nursery milk scheme entitles children under five in approved day care to 189ml of milk each day, free of charge. (GOV.UK)
That does not prove a sinister dairy plot. It proves that cow’s milk has institutional backing, public schemes, levy-funded promotion and legal protection around dairy terminology. The cow is not being silenced. The cow has paperwork.
Plant-based milk is hardly a sandal-wearing underdog whispering from a hemp sack either. It is a fast-growing consumer category with aggressive branding, premium pricing and climate messaging polished to a showroom shine. Oatly, the best-known oat drink brand, has turned attitude into packaging so successfully that buying breakfast liquid can feel like joining a minor political movement with foam compatibility.
Sometimes that messaging has overreached. In 2022, the UK Advertising Standards Authority upheld complaints against Oatly ads over environmental claims, including claims about lower CO2e emissions and comparisons involving the dairy and meat industries. The ASA found several claims misleading or inadequately substantiated. (ASA)
The legal system has also been dragged into the milk wars, because apparently civilisation had spare courtroom capacity. In February 2026, the UK Supreme Court dismissed Oatly’s appeal in a dispute with Dairy UK over the trademark “POST MILK GENERATION.” The court found that the mark used “milk” as a protected dairy designation for oat-based products and was not saved by the exemption for clearly describing a characteristic of the product. (Supreme Court UK)
That ruling does not decide which drink is healthier. It decides what words can be used in marketing. Still, it reveals the wider battle: dairy groups want protected terminology and nutritional distinction; plant-based brands want familiar language that tells shoppers how to use the product. Everyone claims to be defending the consumer. The consumer, meanwhile, is trying to buy something for tea without reading a judgment.
The health question has been flattened by both camps. Dairy marketing often leans on tradition, bones, farming and wholesomeness, sometimes glossing over saturated fat, lactose intolerance, allergy and environmental costs. Plant-based marketing often leans on sustainability, modernity and moral cleanliness, sometimes glossing over low protein, inconsistent fortification, added sugars and the awkward fact that some products are mostly water with branding and calcium carbonate.
The best scientific answer is less dramatic than the advertising wants.
For adults with a varied diet, unsweetened fortified soya, oat or almond drinks can be perfectly reasonable. Soya is usually the closest nutritional match to cow’s milk because of its protein content. Oat may be useful for people seeking lower saturated fat and better coffee texture, provided the label is not quietly carrying added sugar. Almond can be low in calories, but it is rarely a meaningful protein source. Fortification is the hinge: calcium, iodine, B12, riboflavin and vitamin D should be checked on the label, not assumed because the carton has a leaf on it.
For young children, the issue is more serious. The 2025 SACN and COT assessment specifically found greater concerns for children aged one to five, particularly around energy, protein and micronutrient intake. It recommended whole or semi-skimmed cow’s milk for children in that age group who consume animal products, while saying fortified, unsweetened plant-based drinks can be acceptable alternatives depending on age, diet and health concerns. (GOV.UK)
For the environment, cow’s milk carries a heavier burden than plant-based alternatives. For nutrient density, cow’s milk remains difficult to replicate without fortification. For ethics, allergies, lactose intolerance and personal preference, plant-based drinks are not a fad waiting to be bullied back into the nut. They solve real problems for real people.
The line to remember is this: “vegan milk” is not one product, and “milk” is not one health outcome. A fortified unsweetened soya drink and a sweetened almond drink are not nutritional twins. Whole cow’s milk and skimmed milk are not the same thing. A splash in coffee is not a child’s main calcium source. A climate argument is not automatically a protein argument. A protein argument is not automatically an ethical argument.
The milk aisle is not asking for loyalty. It is asking for label literacy.
Choose cow’s milk if you tolerate dairy, want a reliable source of protein, calcium, iodine, riboflavin and B12, and are comfortable with the environmental and ethical trade-offs. Choose plant-based if you avoid dairy, want lower saturated fat, care about environmental impact or prefer it, but pick unsweetened fortified options and treat soya as the nutritional front-runner among the common alternatives.
And if either side tells you the answer is simple, check who paid for the advert.
Sources referenced
NHS, “Dairy and alternatives in your diet.” (nhs.uk)
Scientific Advisory Committee on Nutrition and Committee on Toxicity, “Assessment of the health benefits and risks of consuming plant-based drinks.” (GOV.UK)
Harmer et al., “How do plant-based milks compare to cow’s milk nutritionally?” Nutrition Bulletin. (PMC)
Harvard T.H. Chan School of Public Health, “Milk.” (The Nutrition Source)
Our World in Data, “Dairy vs. plant-based milk: what are the environmental impacts?” (Our World in Data)
Agriculture and Horticulture Development Board, “Dairy: Consumer marketing and reputation” and “Dairy campaign delivers strong returns for levy payers.” (ahdb.org.uk)
UK Government, “School milk subsidy scheme.” (GOV.UK)
Nursery Milk Scheme, official scheme information. (nurserymilk.co.uk)
Advertising Standards Authority, “Oatly UK Ltd ruling.” (ASA)
UK Supreme Court, “Dairy UK Ltd v Oatly AB.” (Supreme Court UK)