The aim of the study was to compare the consumption of n-3 and n-6 acids by adults using a vegetarian and traditional diet. The study was conducted on a group of 170 adults (18-50 years old), including 94 respondents following a traditional diet (56 women and 38 men) and 76 people following a vegetarian diet (52 women and 24 men). The research used the method of a 24-hour interview from four days a week (Monday, Wednesday, Friday, Sunday). The record included the quantity and quality of individual meals and drinks. The analyzed data show that the average supply of n-3 fatty acids in grams per day did not differ depending on the diet used. The mean daily consumption of n-6 fatty acids in grams/day was similar among respondents consuming traditional and vegetarian diets. In this study, the proportions of n-6: n-3 acids consumption were slightly lower among people consuming a vegetarian diet than a traditional one. The study showed that people consuming traditional diets fulfilled the demand for EPA and DHA fatty acids to a significantly higher degree than people following a vegetarian diet. Men preferring the traditional diet significantly better fulfilled the daily requirement for DHA and EPA acids than women. A reverse tendency was found among respondents who consumed a vegetarian diet. The supply of LA acid with the vegetarian diet exceeded the recommended daily amount (especially among men), while with the traditional diet it was too low in relation to the recommended values. On the basis of the presented research results, it should be concluded that both in people consuming a vegetarian and a traditional diet, the supply of n-3 and n-6 ​​acids should be modified in order to ensure an adequate amount of these nutrients in both studied groups. In particular, the supply of n-3 acids should be increased in order to maintain the best n-3: n-6 ratio. Such a modification would help to a certain extent prevent, among others, diet-related diseases such as type 2 diabetes, atherosclerosis, hypertension or ischemic heart disease, as well as bring many other positive health consequences for our body.