On 7 April 2017 the Department of Business and EU Laws of the University of Economics, Prague (Czech Republic) hosted an expert seminar on borderline products on the EU Internal Market. Members of the scientific committee of the workshop presented 30 separate mini-topics on the delimitation of medicinal products, foodstuffs, cosmetics products, medical devices and biocides. Also, a presentation was held by Professor Bernd van der Meulen of Wageningen University (a member of the editorial board of the European Food and Feed Law Review), who also commented on the individual topics together with Anu Lähteenmäki-Uutela of the University of Turku (Finland). The sharing of a comparative perspective on the functioning of supervisory bodies in the Netherlands and in Finland, respectively, was a particularly enriching experience for the workshop participants originating mainly from the Czech and Slovak Republics. A broad discussion following the initial presentation of the topics included representatives from academia, consumer organizations, state supervisory bodies, industry, consultancies and law firms. The following summary shall address the most essential, the most interesting and the most debated topics of this meeting.