The opposite of Halal is Haram, which means unlawful or prohibited.
Halal is an Arabic word which means lawful or permitted
Muslims and Jews (Kosher) have strict dietary laws. The Islamic dietary laws and defined in the Holy Quran (revealed Divine Book), the Hadith (saying of the last Prophet Muhammad, Peace and Blessing be upon Him) and in the Fiqh (Jurisprudence) of the Muslim juries: Hanafi, Shafi, Maliki and Hanbali
Certification of food products and food outlets as Halal is very serious and should only be carried out by an accredited halal certification body.
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