This book examines how the European Union promotes public health in its external relations and evaluates the effectiveness of such action. The study aims at two sub-objectives: an examination of the constitutional framework governing EU public health, with a particular emphasis on its external dimension, and an assessment of the factors influencing the effectiveness of the promotion of EU public health at the global level. While the research undertakes a horizontal study of EU public health, it is illustrated by numerous case studies. These include the Union's external promotion of tobacco-control legislation, its role in the fight against cross-border health threats, the balance of trade interests and public health in bilateral trade and investment agreements, and the position of the Union towards intellectual property rights and public health at the WTO.