Answered by: Maulana Mustafa Umar
Assalamu Alaikum Wa Rahmatullah
Soya sauce, some of the companies brew them causing fermentation, would that be permitted?
بسم الله الرحمن الرحيم
In the name of Allah, the Most Gracious, the Most Merciful.
Assalamualaikum Wa Rahmatullahi Wa Barakaatuh
The process of fermentation does not cause a product to become impermissible [haram] to consume. The problem of whether the product turns into wine or intoxicates like wine. Imam Quduri says, “When wine becomes vinegar it is lawful…it is not disapproved to make wine into vinegar.” [Mukhtasar al-Quduri p. 564, Ta-Ha Publishers 2010] Wine turns into vinegar through fermentation but loses its intoxicating quality. Therefore, even though soy sauce is produced through fermentation, since it cannot intoxicate and does not resemble wine in any significant way, it is allowed to consume.
Only Allah knows best
Written by Maulana Mustafa Umar
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
This answer was collected from DarulIftaBirmingham.co.uk, which is run under the supervision of Mufti Mohammed Tosir Miah from the United Kingdom.