I think if you actually tried to fill your plate like that at every meal, you'd be doing pretty good. The entire left half must be fruits and vegetables. It's a nice improvement for people who are too uneducated to understand percentages--who also tend to be the worst eaters.
Of course, no one's going to pay any more attention to this than they do to any other basic health recommendations. But I do think it's a major improvement.
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