How can I find out which hechsheirim are reliable and which ones aren't?
Is there any halachik problem with eating fish and milk together? (A classic example is a bagel with lox and cream cheese)
I have noticed that many cans of pepsi don't have a hechsher (kosher symbol) on them. Do they need one?
The OU used to put DE next to the OU symbol when a product was Dairy Equipment. Such a product can not be eaten with meat but can be eaten right afterwards (you don't need to wait the amount of time ...
Why are some wines kosher and some not?