Home Dietary Hub Questions Is Parmesan vegetarian?
Quick answer · Vegetarian
Is Parmesan vegetarian?
No (Parmigiano-Reggiano)
Parmigiano-Reggiano isn't vegetarian. Its official recipe requires calf rennet. Some cheeses sold as "parmesan-style" or "Italian hard cheese" use microbial rennet and say vegetarian on the label.
Rennet is the enzyme that turns milk into curd. Traditionally it comes from the stomach of a young calf. Protected cheeses like Parmigiano-Reggiano have to follow their official recipe, and that recipe calls for calf rennet, so no genuine Parmigiano-Reggiano is vegetarian.
Grana Padano and Pecorino Romano are in the same position. The Vegetarian Society also lists Gruyère, Gorgonzola, Manchego, Emmental, Camembert, Raclette and Roquefort as usually not vegetarian.
What to check
- "vegetarian" on the package
- "microbial", "vegetable" or "non-animal" rennet
- pesto and cheese crisps, which often use Parmigiano-Reggiano
Our verdicts
| Ingredient | Vegetarian |
|---|---|
| Parmigiano-Reggiano | SkipThe official recipe requires calf rennet. |
| Grana Padano | SkipMade like Parmigiano-Reggiano, with animal rennet. |
| Pecorino Romano | SkipTraditionally made with lamb rennet. |
| Parmesan Crisps | SkipMade from Parmigiano-Reggiano or parmesan, usually with animal rennet. |
| Pesto | Check the labelClassic pesto uses Parmigiano-Reggiano, made with animal rennet. Some jars use vegetarian cheese. |
What to use instead
For the same nutty, crystalline bite, use an aged cheese labeled vegetarian:
Aged GoudaAged CheddarMimolette
The full vegetarian guide: every ingredient, swaps and setup →
Sources
- Parmesan (Parmigiano-Reggiano production rules)
- Vegetarian Society: Which cheeses are suitable for vegetarians?
Reviewed October 1, 2026. Brands change their recipes, so we re-check these pages every 6 months. For a serious allergy or celiac disease, read every label and ask your guest. How we classify ingredients.
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