Halal (حلال, ḥalāl, Halaal) is an Arabic term designating any object or an action which is permissible to use or engage in, according to Islamic law and custom. It is the opposite of haraam. The term is widely used to designate food seen as permissible according to Islamic law. It is estimated that 70% of Muslims worldwide follow halal food standards and that the global halal market is currently a $580 (U.S.) billion industry.
In the Arabic language, the word 'halal' refers to anything that is permissible under Islam.
Islam has laws regarding which foods can and cannot be eaten and also on the proper method of slaughtering an animal for consumption, known as dhabiĥa.
Explicitly forbidden substances
A variety of substances are considered as harmful (haraam) for humans to consume and, therefore, Forbidden as per various Quranic verses:
* Pork meat (i.e. flesh of pig)[Qur'an 2:173] * Blood[Qur'an 2:173] * Animals slaughtered in the name of anyone but God. All that has been dedicated or offered in sacrifice to an idolatrous altar or saint or a person considered to be "divine". [Qur'an 2:173] [Qur'an 5:3] * Carrion[Qur'an 2:173] * An Animal that has been strangled, or beaten to death, or killed by a fall, or gored to death, or savaged by a beast of prey, except that which you may have slaughtered while it was still alive; [Qur'an 5:3] * Food over which God's name is not pronounced. [Qur'an 6:121] * Alcohol and other intoxicants. [Qur'an 5:90-91] * Smoking E.G Tobacco , Weed Etc
Lawful, to you is all water-game, and that which the sea brings forth, [Qur'an 5:96]