Objectives:
The aim of this study was to assess the prevalence, causes and forms of use of mind boosters in Poland.

Methods:
This study was based on an original questionnaire, and was carried out on the internet before banning of mind boosters in Poland.

Results:
The study covered 3013 people, aged 24.7 + / - 6.9, of which 9.3% admitted to use mind boosters (6.5% of women, and 14.7% of men , P < 0.01). The highest percentage of mind boosters users was in age groups of 19-25 years (10.6%). Most people taking mind boosters did so less than 1 time per month (71.8%). The most common reasons for taking mind boosters were curiosity (46.4%), the desire to have fun (26.8%), and to improve the well-being (10.7%). Mind boosters were most often used during meetings with friends (68.9% of cases), and social events (52.1%). The majority of their users adopted the other risky behaviors: 56.4% took them with alcohol, 86.4% tried narcotics at least once, and 13.9% decided to try narcotics after trying mind boosters.

Conclusions:
1. Among respondents to the online survey 9.3% admitted to use legal highs. 2. A typical profile of a legal high user is a young man, using them out of curiosity, to improve the well-being or just for fun, usually in social situations. 3. Initiatives undertaken to reduce the use of legal highs have to consider its social context.