This research explores the phenomenon of misleading advertising in the world of consumption, with an emphasis on the study of the mechanisms of legal and constitutional protection. The work, of a scientific and informative nature, is completed with a comparative study of advertising offences, highlighting their characteristics in relation to the right to information. The increase in cases of misleading advertising requires interdisciplinary legal research on advertising discourse and the application of the principle of constitutional truthfulness, in accordance with the doctrinal position of various specialists in the field. The author, in an agile and dynamic style, analyses the application of the concept of truthfulness in advertising, determining the causes that generate advertising deception. The book is completed with a study of the control measures established by the public authorities in the constitutional framework, as well as in European legislation.