The fact that you mentioned butter and not synthetic dyes, glyphosate, seed oils, or literally anything else is part of the problem (ie corporate capture).
I would still put my money on a person eating a commodity, non-organic, seed oil rich diet that is sanely balanced and appropriate for their activity level being healthier on average than an overeating gluten free organic-everything only touched by hemp fiber vegan who never exercises.
I covered corporate capture in the second half of my comment.