Ustadh ٱلسَّلَامُ عَلَيْكُمْ وَرَحْمَةُ ٱللَّٰهِ وَبَرَكَاتُهُ Are cheeses made with rennet from non-Islamically slaughtered calves (e.g. Parmigiano Reggiano, Grana Padano) halal? And are vinegars produced from wine or alcohol (wine vinegar, spirit vinegar, balsamic) halal?

Rennet from an animal not slaughtered Islamically has two sayings: Shaykh al-Islam Ibn Taymiyyah held it is pure and the cheese lawful, while Mālik, al-Shāfiʿī and one narration from Aḥmad held it impure. Wine that turned into vinegar by itself is allowed, wine deliberately made into vinegar is forbidden according to the Permanent Committee while others allow it, and vinegar with alcohol added to it is forbidden by that.