🇬🇧 Article

Is Rennet Halal?

What is rennet?

Rennet is a set of enzymes used to curdle milk into cheese. It can be:

• Animal rennet — from the stomach lining of young ruminants (calves, lambs).
• Microbial rennet — produced by fungi or bacteria.
• Vegetable rennet — from plants like thistle.

Why is its halal status uncertain?

For animal rennet, the question is whether the animal was halal and slaughtered Islamically. There is also a genuine scholarly debate: some scholars hold that rennet is halal regardless of source because it is a transformed enzyme, while others require a halal source.

So, is it halal or not?

Microbial and vegetable rennet are halal. For animal rennet of unknown origin, a precaution-first stance is to treat it as doubtful unless certified, while recognising that some scholars permit it broadly.

How to check rennet before you eat

• Look for "microbial rennet", "vegetable rennet" or "suitable for vegetarians".
• Look for a halal certification on the cheese.
• Contact the producer for animal rennet of unknown origin.

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This article is for general information and is not a religious ruling (fatwa). For specific cases, consult a qualified scholar.