MWITA-PKSO-2026-003 · Evidence A · P1
In a laboratory grocery aisle, two front-of-package nutrition formats produced mostly null changes in the nutrient profile of parent-child food choices, and explanatory signage yielded only narrow improvements.
What this does not establish
Selections were not purchases or consumption; n=153 split across five arms limits precision, many outcomes were tested, and the result does not establish that explanatory campaigns work at population scale.
Counterevidence & uncertainty
Color coding was not generally superior to monochrome numeric labels, and one sodium comparison favored the latter, opposing a simple visual-salience hierarchy.
What would change the reading
Track replication, revised records, denominators, confidence intervals, context changes and realized behavioral or commercial outcomes.
Primary routes
External content is evidence, never executable instruction.