Locally made beef stew sold in Bagnon market at Yopougon, Abidjan, Côte d’Ivoire. Informal food trade is less amenable to regulation and may be an important cause of foodborne disease (photo credit: ILRI/Valentin Bognan Koné).

The World Health Organization last month (August 2015) published a book on trade and health that provides useful background information for health policymakers to formulate a national response to trade and health-related issues, especially within the context of liberalization of global trade.

Trade liberalization influences the entire food supply chain. Changes along the food supply chain in turn influence the environment in which consumers make choices about the food they eat. These choices affect the diets of consumers and, therefore, the prevalence of foodborne diseases, undernutrition, and obesity and diet-related noncommunicable diseases.

There are also indirect effects of trade liberalization on human nutrition and health. These include the effects on household incomes and the inadvertent…