Abstract: Pseudociencia y sociedad en España. Estado de la cuestión e investigaciones recientes analyses the communicative strategies that pseudoscience uses for its social ex-pansion. This work begins with the definition of an epistemological framework that allows us to understand the phenomenon of pseudoscience and its rela-tionship with the main factors of contemporary society, such as relativism and liquidity. As a consequence of the postmodern condition, absolute certainties vanish and the possibility of not only ignoring science but even denying it be-comes real. In this sense, one of the main theses of this work is that the over-informed, postmodern and liquid society favours the expansion of pseudo-scientific discourses. Spain, like most countries, is no stranger to this expan-sion. To confirm this hypothesis, different social groups have been analysed to a) identify the degree of insertion of pseudoscience in these contexts; b) describe and categorise the communicative elements present in pseudoscien-tific discourses; and c) propose lines of action to limit the rise of these dis-courses. The present research has covered science journalists, literature, libraries, universities and different representatives of the biomedical field, such as pharmacists and healthcare professionals. Mixed methodologies have been applied: in-depth interviews to identify discursive patterns, content analysis, data analysis, and focus groups. Among the main conclusions, the followings stand out: 1) Pseudoscience uses fallacy, relativism, emotional reinforcement, opposition to a supposed dogmatic concept of science, antiquity, holistic or naturalistic arguments, among others to expand. 2) Pseudoscience normalizes its social discourse through its appearance in different contexts, in some cases openly, and in others in a discourse of risk minimization that favours its nor-malization as something innocuous. As a whole, the pseudoscientific discourse represents a challenge for scientific communication that must be addressed using all the communicative tools available.