Allah (swt) commanded the Prophets and human beings to eat halal and pure (Hygienic) food. In fact, eating halal food has to do with one's worship, morals and affairs as well. As it is ordered to eat halal food, it is also forbidden to eat or drink intoxicants. Drugs and alcohol are widely used in food and cosmetics these days. The main purpose of this research is to explain the reality of drugs and alcohol in a Shari'ah context, and to describe the use of alcohol in industries. For this purpose, first of all, the reality of drugs, their types, the Shari'ah rules related to them, its prohibition in the Qur'an and Sunnah and the opinions of the jurists have been mentioned. Later, the reality of alcohol, its types, the opinions of jurists about it and its use in industries are discussed in detail. As a result, it is understandable that drugs and alcohol derived from dates and grapes, according to all the jurists, it is not permissible to use them at all, while drugs and alcohol derived from other natural and artificial (synthetic) sources can be used in food as much as it is needed and as long as it is not intoxicating. Moreover, Islamic jurisprudence did not explain the technical details by stating the Shari'ah rule of drugs and alcohol, but left it to the general experience, observation and food experts. Therefore, according to experience, where intoxication is proved, the Shari'ah rule will be observed.
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