I think any food standards watchdog organisation has a problem, because the food industry will naturally tend towards addictive junk. Some of that might be acceptable for sale on its own, but when it makes up the majority of food for sale nation-wide, that's not going to work. Say, for instance, that a certain amount of sugar is acceptable in foods for sale. It's kind of okay if it's high in one or two things, but when the high level is the new "normal", you're going to start messing up the insulin sensitivity of your entire population.
Mokalus of Borg
PS - It will always, to some degree, be an individual's responsibility to eat healthy.
PPS - A food standards organisation can only really ban foods that will kill you immediately.