Bromide: How do we know when it is in bread?

I looked at my usual brand of bread, a pretty healthy hearty type. Saw nothing in the ingredient listing that sounded likeBromide or Bromine, but the cheapo fluffy white bread didn't list that either. What do they call it in the ingredient list? Dough conditioner or something? Also, does home-baked bread from a bakery or say, "Subway" have bromide in it? Sorry, I tried to find the answer online, but had no luck. Thanks!