Thirty years of research in tobacco control has shown that countermarketing has been effective in reducing tobacco use, especially among teenagers and young adults. This policy brief by investigators at the City University of New York Urban Food Policy Institute describes some of the key elements of effective tobacco countermarketing campaigns, and examines the relevance of these evidence-based countermarketing practices to unhealthy food and beverages, defined as processed products high in unhealthy fats, sugar, salt and empty calories