Introduction:
Recently, the role of the gut microbiome has become increasingly well known in the scientific community and its term in human health has been investigated, as well as its interaction with nutrition and the occurrence of obesity.

Purpose:
This study aims to investigate the knowledge of nutrition experts in Greece regarding the effect of the gut microflora, as well as the attitude regarding the practical application of this knowledge to their patients and how they are using this information to help their clients.

Methods:
For the purpose of the study, a questionnaire was filled in by a random sample of 122 nutritionists. The applicants had to answer 26 questions which were related to demographics, their knowledge about the gut microbiota, related to obesity and diet, the corresponding recommendations given to clients and their willing to be informed for this topic. The results were analyzed in Microsoft Excel and IBM SPSS Statistics 21 and was executed chi-square test.

Results:
It seems that young adults have more knowledge about the intestinal microbiota, its relationship with nutrition and obesity and are willing to learn more for this topic. The majority of those who have more years of experience, but also those who have higher education than the rest (PhD), seem to take more into account the gut microflora in the practical part of the profession. Finally, the results show that participants, who have been informed about the role of gut microbiota in health, have more knowledge about its relation to diet and obesity.

Conclusions:
The participants were well informed about the new data concerning the intestinal microbiome, but not sufficiently. It turned out that the age, years of experience, education and knowledge about gut microbiota affect importantly their responses and it also seems that there is the will to gather further information.