The highest concentration of vitamin E was obtained in black currant seed oil extracted by SFE at 50[degrees]C, while bilberry seed oil extracted by hexane extraction had the lowest vitamin E content.
The use of SFE at 350 bar and 50[degrees]C for the extraction of black currant seed oil was advantageous for the recovery of [alpha]-tocopherol (122 mg/100 g oil), whereas for bilberry seeds, extraction at 80[degrees]C was more efficient.
Analyses of the levels of vitamin E in bilberry seed oil extracted by SFE (59 to 69 mg/100 g oil) and black currant seed oil extracted by SFE (242 to 113 mg/100 g oil) showed that the concentrations were higher than those reported in the literature for oils extracted with SFE (40 and 110 mg/100 g oil, resp.) .
Black currant seed oil extracted by hexane showed a high recovery of carotenoids, similar to that of the cloudberry seed oils extracted by SFE.
For SFE, the yields of cloudberry and black currant seed oils were higher at 80[degrees]C than at 50[degrees]C.
The largest relative compositional difference measured was the concentration [alpha]-linolenic acid (18:3 n - 3), which was significantly lower in the black currant seed oils extracted by hexane.