I wish I could say I'm surprised, but I'm not. Food is one addiction you cannot break by abstaining. Alcoholics do well to avoid booze, drug addicts can stop sniffing, shooting up, or popping pills, etc. Food addicts cannot stop eating - the human body needs fuel.
If there were a way to chemically turn off the taste mechanism, would that work? If eating were not pleasant, I believe we'd do less of it. All food would be as unattractive as rice cakes; eating would become as boring as tooth brushing.