The evolution of fast-food governance is increasingly revealing of how global food systems law is going to develop. At the same time, fast-food rules decline differently depending on the legal system in which they are placed.This book compares the regulation of fast food in the European Union and the United States, analysing the interactions between internal and external, public and private, and global and local regulators.In particular, the regulatory aspects related to health (affected by the consumption of junk food) and the sustainability of fast-food products are analyzed from a comparative perspective. Lastly, a specific chapter is dedicated to the regulatory challenges related to the hamburger and its substitutes as a case study emblematic of the divergences and convergences between the EU and US legal systems.