Jews make blessings upon the occasion of enjoying food and other things (“Birkos hanehenin”). Jews don’t need to bless their food because the Jews (and everything to do with them) are already blessed, see the Bible. Personally, if my food was in bad enough condition to require preceding a Bracha, I would rather go hungry!
So what is this I hear about Kabbalists distributing “blessed” oil, water, coins, fruit…?
Don’t know. I wouldn’t know how to go about finding the answer easily and I’m too nervous to try. Either way, it’s not my problem. Let them justify whatever it is they think they do.