I’m not surprised that the term ‘natural’ has no official regulatory meaning on food labels. Sure, it’s a shame that any company can call any product ‘natural’, but that’s not because of the government’s failure to regulate the term. It’s because of the public’s vacuous understanding of that term in the first place.
Honey, spare ribs, tree bark and poison ivy are all equally natural, and are not recommended in large quantities. Frozen vegetables, yogurt and dried fruit are all ‘unnatural’ in that they’ve been processed significantly, but they’re not particularly bad for you.
Face it: ‘Natural’ is a marketing term disguised as a factual claim. Ignore it and it will eventually go away.