Thirty-two fatteners were divided into 4 groups: two of them were fed semi ad libitum (A) during the growing (22–60 kg) and finishing (60–102 kg) periods of fattening and two, a restricted (-25%) amount of feed (R) in the growing period and semi ad libitum in the finishing period. During the finishing period within each level of feeding, one group received 0 (AC and RC) and the other 4% (AO and RO) linseed oil. Pigs fed the restricted amount of feed had a more beneficial fatty acid profile in the M. longissimus dorsi and M. semimembranosus, however, the differences were not statistically significant. The 4% supplement of linseed oil in the finishing diets caused an increase in the PUFA content, of n-3 in particular.