Is nisin vegan? It depends on how it was made
Often made in a milk-based growth medium. Only a vegan label confirms it.
The full answer
Nisin (E234) is an antibacterial protein made by Lactococcus lactis, a bacterium used in cheesemaking. The nisin itself isn't an animal product.
The question is what the bacteria are grown on. The best-known commercial nisin is grown in a milk-based medium and sold mixed with milk solids. Some newer versions are grown on plant sugars and are dairy-free.
In practice, nisin is mostly used in processed cheese, puddings and liquid egg, which aren't vegan anyway. When it shows up in a plant-based product, the brand has usually chosen a dairy-free version.
If you avoid dairy strictly or have a milk allergy, look for a vegan or dairy-free logo, or ask the manufacturer.
What to look for on the label
- A vegan or dairy-free logo
- "Contains: milk" in the allergen statement
- Nisin in plant-based cheese is usually dairy-free
Other diets
Find dairy-free cheese you can trust
Plant-based picksVegan cheese slices
Certified plant-based, so every ingredient is covered.
Shop vegan cheese Opens your country’s Amazon storeCashew cheese making kit
Cultures and recipes for fermented plant cheese at home.
Shop vegan cheese kits Opens your country’s Amazon storeNutritional yeast
Cheesy flavor for sauces with no dairy and no preservatives.
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Common questions
Is nisin safe with lactose intolerance?
Yes. Any milk carried over is in tiny amounts, far below what causes symptoms.
Safety score, rules by country, health notes and swaps.