Is imported gelatin found in Arab countries permissible (halal)? Are these materials subject to monitoring? And is it necessary to investigate everything that is bought?

The basic principle concerning foodstuffs found in Muslim countries, whether produced locally or imported, is that they are pure (ṭāhir) and permissible (ḥalāl). A Muslim in an Islamic environment should adhere to this principle and not deviate from it unless there is evidence to the contrary. Precaution (iḥtiyāṭ) and piety (waraʿ) in refraining from some of them are better, as long as it does not reach the point of forbidden extremism (ghuluw). The presumption is that the relevant authorities monitor imports and that Muslim merchants only import what is pure and permissible.