Not Vegan (Animal-Derived)Category: animal-byproduct, additiveReviewed: Aug 1, 2025

Rennet

Traditional rennet is an enzyme complex harvested from the fourth stomach (abomasum) of slaughtered unweaned calves. Microbial or vegetable rennet is vegan.

Vegan Status Breakdown

Traditional rennet is an enzyme complex harvested from the fourth stomach (abomasum) of slaughtered unweaned calves. Microbial or vegetable rennet is vegan.

Biological Origin & Animal Source:

Stomach lining of young calves

Common Synonyms, E-Numbers & Trade Names:

animal rennetchymosinbovine rennetcalf rennet

Hidden & Derivative Names to Watch Out For:

animal rennetchymosin derived from calf stomach

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Common Uses & Applications

•Coagulating milk in traditional cheese production (Parmigiano-Reggiano, Gruyere, Pecorino)

Plant-Based Substitutes

Culinary swaps with exact ratios and chef instructions

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Nutritional Yeast

flavour, protein
Ratio: 1 tbsp nutritional yeast per 1 tbsp grated parmesan (Can blend with raw cashews, garlic powder, and salt for grated texture)

Blend 1/2 cup nutritional yeast with 1/2 cup raw cashews and 1/2 tsp sea salt for instant vegan parmesan shaker.

Full Swap Guide →🍳 Cook Recipe

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Scientific & Regulatory Authority Sources:

Frequently Asked Questions

Is Parmesan cheese vegan?
No. True Parmigiano-Reggiano legally requires animal rennet under PDO regulations.