بسم الله الرحمن الرحيم
(Fatwa: 1578/1042/L=01/1434)
Soya bean is a kind of vegetable, there is no harm in using it. We are not sure that it contains pig fat as well as we do not know what the ingredients of soya bean sauce are.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
