The methodical problem, meaning the subject of this research are the habits of consumption of substances and food supplements of basketball referees. For the player and, proportionally, for the referee the physical status i.e., physical condition demands a higher degree than it was in the basketball's and sport’s past. In order to respond to the demands that come with today's modern basketball, referees must be in good physical condition. The research was conducted by survey, meaning the instrument of this research was a survey sheet containing sixteen questions which are appropriate to the research subject. The survey was conducted anonymously, and the data was processed using statistical analysis. Before conducting the research, based on studying prior and similar research hypotheses were set to navigate the research. In the research The impact of different levels of blood alcohol concentration on psychomotor tasks given results showed that alcohol affects the velocity of reaction. Different levels of blood alcohol led to statistically meaningful differences in reaction velocity; if the blood alcohol level is higher, the reactions are slower. In the research Acute administration of nicotine does not enhance cognitive functions the results show that smoking cigarettes during performing certain tasks did not improve attention, working memory and space-visual resonance. Hypotheses are, therefore, oriented on the assumption that consummating substances and food supplements affect the work itself and the fitness of basketball referees. The hypothesis of this research that refers to consumption of nicotine products is rejected while the hypotheses about the consumption of alcoholic products and food supplements and the hypothesis about frequency of injuries are accepted.