Is it vegan? Ingredients
Is whey vegan?
Quick answer: No. Whey is the liquid left after milk is curdled to make cheese, so it is a dairy product and not vegan.
Also called: whey powder, whey protein, whey protein concentrate, whey protein isolate, milk serum
Why it isn’t vegan
Whey is a by-product of cheese and casein production. It is dried into whey powder or concentrated into whey protein and used widely in protein supplements, baked goods, crisps, chocolate and processed foods.
Whey must be labelled as a milk allergen in the EU and UK. Plant-based protein powders based on pea, soy, rice or hemp are vegan alternatives.
What to look for on the label
- whey, whey powder, whey solids
- whey protein concentrate/isolate
- milk allergen in bold (UK/EU)
Where it’s found
- Protein powders and bars
- Crisps and flavoured snacks
- Biscuits, bread and chocolate
Vegan alternatives
- Pea, soy, rice or hemp protein
Frequently asked questions
Is whey vegan?
No. Whey is the liquid left after milk is curdled to make cheese, so it is a dairy product and not vegan.
Sources
- Animal-Derived Ingredients List — PETA
- Regulation (EU) No 1169/2011 on food information to consumers (allergen labelling, Annex II) — EUR-Lex
- Allergen guidance for food businesses — Food Standards Agency (UK)
Checked on 31 October 2026. Ingredients and recipes change, and the same product can differ between countries — always check the current label. This page is general information, not allergy or medical advice.