Respected Mufti Sahib: As-Salaam-O-Alaykum-Wa-Rahmatullahy. If an igredient(L-Cystine), which can be derived either synthetically or from HUMAN HAIR, renders the food item(s) HARAAM? Wa-As-Salaam-O-Alaykum-Wa-Rahmatullahy. Jazakallah-O-Khair, for your prompt response to my question.
1. It is not permissible to use any item that contains human hair. (Bahrur
raaiq part6 pg.81)
2. If the source of an item is uncertain then too it is preferable to
refrain from using such items until proper research is made into the
contents of the article. In a Hadith, Nabi (Sallallaahu Alayhi Wasallam)
mentions, ‘Verily Halaal is clear, and verily Haraam is clear. And between
them there are certain doubtful matters many people are unaware of them,
therefore, who stays away from doubtful matters he has protected his Deen
and honour. And who gets involved in doubtful matters, he would fall into
Haraam.’ (Bukhari; Muslim)
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai