MEZIS (“Mein Essen zahl ich selbst”, or I pay for my own lunch in German),was founded in 2007 by incorruptible (German speaking) doctors. MEZIS fights the ubiquitous influence and unwarranted power of the pharmaceutical industry in healthcare. It also raises awareness amongst fellow doctors and medical students that accepting pens, food, trial sponsorship, travel expenses and remuneration for post marketing surveillance studies (PMSS) makes one’s prescribing habits vulnerable to influence. We demand a clear prohibition of influencing and corruption in the regulations of medical professionals and promote producer-independent information and continuing medical education (CME) programmes, along with medical software that is free from advertising. MEZIS is part of the worldwide “No free lunch” network.