It is therefore necessary to ensure that the physical body is kept healthy so that the soul and spirit may also remain healthy thus in turn aiding the believer in the service of both his spiritual and material attainment. Diet therefore, plays an important role for this purpose. For this reason Islam has prohibited certain foods due to their ill effects and permitted all other pure, good and clean food products. Allah Ta’ala says in the Noble Quran:

''O’ Believers! Eat of the good and pure (lawful) that We have provided you with and be grateful to Allah, if you truly worship Him.'' (Surah al-Baqarah, 172)

Muslims in general are advised to eat good and pure things and not to indulge in impure, bad and harmful things thus following their open enemy Shaitaan:

''O people! Eat of what is lawful and good on earth, and do not follow the footsteps of Satan. He is to you an open enemy.'' (Surah al-Baqarah, 168)

In the verses previously mentioned the general principle with regard to permissible foods has been stated. The Noble Quran further goes on to specify the types of food prohibited in the following verse:

''He (Allah) has only forbidden you (from eating) dead animals, blood, the flesh of swine, and that (animal) over which the name of other than Allah has been invoked.'' (Surah al-Baqarah, 173)

The four items that have been mentioned in the above verse are absolutely forbidden in Islam for reasons best known to Allah. However, through research, some of them such as carrion, blood and swine flesh have proved to be injurious to human health. Whilst swine flesh is harmful to moral health and food over which the name of any other than Allah has been invoked is harmful to spiritual health.