Cow's milk vs Oat milk
Key facts
- Compared
- Cow's milk vs Oat milk
- Unit
- per litre
- Metrics
- Greenhouse gases, Land use, Freshwater withdrawal, Calcium (fortified)
- Source
- Poore & Nemecek (2018), via Our World in Data · USDA FoodData Central · Fortification and nutrient content vary by product.
per litre
Source: Poore & Nemecek (2018), via Our World in Data: ourworldindata.org · USDA FoodData Central: fdc.nal.usda.gov · Fortification and nutrient content vary by product.
Verdict
Oat milk uses about a third of the emissions and a tenth of the land.
Questions people ask
Which plant milk is lowest impact overall?
There is no single winner on every measure. Soy uses less freshwater than oat in the cited dataset; almond has lower greenhouse-gas emissions but higher water use.
Is fortified oat milk nutritionally comparable?
Fortified oat milk can provide calcium, B12 and vitamin D, but iodine is not always added. Check the label; protein is generally lower than dairy or soy milk.
Related comparisons
Data: Poore & Nemecek (2018), via Our World in Data · USDA FoodData Central · Fortification and nutrient content vary by product. · Free to reuse under CC BY 4.0 with a link back.
What the comparison can and cannot tell you
Check the denominator before interpreting a difference: a kilogram of food, a serving, a calorie and a gram of protein answer different questions. Equal weights are not automatically nutritionally equivalent meals. Keep the original source's system boundaries and preparation state when comparing values.
Environmental estimates depend on farming, processing, geography and the study's assumptions. A global average is not a measurement of your own purchase. Broad patterns can guide choices, but the size or ranking of a particular difference needs the relevant study rather than a blanket claim about every animal and plant food.
- Use the same unit and the same raw or cooked state for both foods.
- Check which impacts the source includes; carbon, water and land are separate measures.
- Do not infer a medical benefit from a lower footprint.
- Balance the replacement meal with suitable protein, energy and micronutrient sources.