Which ones? The guidelines this replaced were "half your plate should be fruits and vegetables, the other half protein and grains (at least half of which should be whole grains)." That's not way different from this.

There are differences: the previous guidelines are very down on saturated fat, for example. But I feel like a lot of people are imagining that this is replacing the old food pyramid with the huge grain section at the bottom bigger than everything else, when that's been gone for over a decade.

Realistically I don't think these guidelines really have much effect at all, except maybe things like school lunch programs that may be downstream of them.

And what does it say about traditional governance that it takes a someone like RFK to actually do anything about it.