Scientific studies today have shown that rennet is not derived from the substances found in the animal’s stomach but is rather a liquid obtained from the stomach itself. It can be viewed as the gastric (rennet) juice. Since the enzymes that constitute the rennet, such as chymosin and pepsin, are found in the stomach itself, comparing rennet to the milk of the animal does not seem accurate. Rather, it is considered a part of the animal. Thus, it can be said that rennet follows the same ruling as the meat, fat, and other organs of the animal from which it is derived. Therefore, it can be concluded that when rennet is obtained from an animal that has been slaughtered according to Islamic methods, it is halal; when obtained from an impure (haram) animal, it is haram.
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