Behavioral economics has become a popular field of study. With the reconsideration of the homo economicus paradigm, psychology and sociology have infiltrated economic theory. More recently, several commentators have argued in favor of an incorporation of behavioral economics within antitrust law. This paper argues, however, that EU competition law already integrates the findings of behavioral economics. A review of the Article 102 TFEU case-law reveals that contrary to the more conservative approach adopted by US agencies and courts, EU competition authorities already acknowledge the boundaries and biases of economic agents, and take into account the limits of the rationality assumption whilst drafting their decisions.