Nornagest:

Nutrition's also entangled with a horrific mess of body-image issues and cultural expectations. These aren't essential to any of the strains of cultural criticism that they intersect, so I don't think I'd call them ideological; but because they're so closely linked to people's identities, they exhibit a lot of the problems we associate with ideology.

Well said. As you say, "ideological" is not a very accurate term here, but I meant it to also encompass this sort of thing.