Objectives: To assess the quality of abstracts of randomized controlled trials in which the effectiveness of omega 3 fatty acids in psychiatric patients was examined. Materials and methods: Abstracts were searched in the MEDLINE database using the PubMed search engine with the keywords "omega 3" and "psychiatric" as well as the filter "randomized controlled trial". The CONSORT-A tool, containing a total of 17 items, was used to assess the quality of abstracts. The abstracts were then analyzed to determine their adherence to CONSORTA guidelines. The software used to analyze and interpret the results was MedCalc. Results: We found a total of 169 abstracts of randomized controlled trials, in which the effectiveness of omega 3 fatty acids in psychiatric patients was examined.The median value for the total sum of all examined CONSORT-A items was 7 with the interquartile range of 6-9. Significant differences were found regarding the presence of CONSORT-A items depending on the abstract structure. The items that were reported the most frequently among the found articles were aim, trial registration, recruitment and conclusion while those with the least were funding and randomization. Conclusion: Abstracts of randomized controlled trials in which the effectiveness of omega 3 fatty acids in psychiatric patients was examined were of low to moderate quality according to the criteria of the CONSORT-A list. There was a lack of information of the founding source and randomization process in the most abstracts which impacts the transparency and trustworthiness of the clinical trials. Because of this, a need for better documenting of further research appears.