A biomarker of exposure to snuff smoke in non-smokers has been reviewed in a new study, and also their perception before and after the entry into force of two Spanish laws. Law 28/2005 which entered into force in January 2006 partially prohibited the consumption of snuff in public. Five years later, in January 2011, the second law of snuff (Law 42/2010) which extended the ban on smoking in all enclosed spaces such as bars and restaurants and some outdoor spaces such as hospital grounds came into force.