Asalamualaykum warahmatullah wabarakatuh,

I’ve been really struggling with my OCD recently, to the point that I can’t focus on other things.

So, I recently learnt that yogurts, cheeses and other products contain live culters/lactic ferments (bacteria) etc as part of their production process, these bacteria that are added can be derived from human/animal/plants and still say suitable for vegetarians, so its really difficult to know fully whether the cheese or yogurt etc is fully halal. From what I have understood, they almost always have these bacteria/cultures added in order to change the milk into cheese/yogurt.

Is it permissable to consume these products while being unsure of the source of the lactic cultures/ferments/bacteria etc?
And if not, are these products then regarded as impure? So if they were to spill on you would it be regarded as an impurity?

I would really appreciate your advice regarding this.

Jazaakumullahu khayran