I know what person you're talking about. I saw him on a show touting his book, "Cures they don't want you to know about" or something to that effect.
He supposedly had this friend diagnosed with acid reflux. Given that prescription and what-not. So he told his friend to take one teaspon of vinegar, his friend took it and shortly after the burning went away. He didn't mention what KIND of vinegar though, did he? I don't remember if he told the guy white vinegar or ACV - --