## 3 Results
### Fatty Acid Composition and Distribution between sn-2 and sn-1,3 Positions of Triacylglycerols
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Fatty Acid** & **Cranberry Seed Oil** & **Black Currant Seed Oil** & **Strawberry Seed Oil** \\ \hline
12:0 & 0.01 & 0.06 & - \\
14:0 & 0.04 & 0.19 & 0.13 \\
15:0 & 0.01 & 0.05 & 0.03 \\
16:0 & 5.89 & 7.95 & 4.71 \\
16:1 & 0.07 & 0.10 & 0.23 \\
17:0 & 0.05 & 0.09 & 0.05 \\
17:1 & 0.04 & 0.05 & 0.06 \\
18:0 & 1.34 & 1.93 & 1.87 \\
18:1 n-9c & 23.99 & 16.09 & 17.26 \\
18:2 n-6c & 36.59 & 48.07 & 44.01 \\
18:3 n-6c & 0.12 & 8.92 & - \\
18:3 n-3c & 31.39 & 15.02 & 29.76 \\
20:0 & 0.11 & - & 1.09 \\
20:1 & 0.23 & 1.19 & 0.34 \\
22:1 n-9c & 0.12 & - & 0.07 \\ other & - & 0.29 & 0.39 \\ \(\Sigma\)SFA & 7.45 \(\pm\) 0.46 \({}^{\rm a}\) & 10.27 \(\pm\) 1.21 \({}^{\rm b}\) & 7.88 \(\pm\) 0.74 \({}^{\rm a}\) \\ \(\Sigma\)MUFA & 24.45 \(\pm\) 1.89 \({}^{\rm b}\) & 17.43 \(\pm\) 0.97 \({}^{\rm a}\) & 17.96 \(\pm\) 1.02 \({}^{\rm a}\) \\ \(\Sigma\)PUFA & 68.1 \(\pm\) 2.28 \({}^{\rm a}\) & 72.01 \(\pm\) 2.75 \({}^{\rm b}\) & 73.77 \(\pm\) 2.03 \({}^{\rm b}\) \\ n-3-n-6 ratio & 1:1.2 & 1:4 & 1:1.5 \\  & \multicolumn{3}{c}{Health indices} \\ IA & 0.065 & 0.098 & 0.057 \\ IT & 0.058 & 0.122 & 0.055 \\ HH & 15.50 & 10.74 & 18.81 \\ \hline \hline \end{tabular} Data denoted by different letters (\({}^{\rm a}\), \({}^{\rm b}\)) are statistically different (\(\alpha\) = 0.05).  
\end{table} 
Table 1: Fatty acid composition [%] and health indices of cranberry, black currant and strawberry seed oils. From nutritional point of view, in addition to the composition of fatty acids, their distribution among internal and external positions in triacylglycerol structure is essential. The three positions where fatty acids can attach via an ester linkage to the glycerol backbone to form triacylglycerollycerol are not equivalent. Fatty acids achieve the best bioavailability at the sn-2 position because it is preserved at all stages of the molecule's digestion. In natural vegetable oils, it is observed that the most important fatty acids for the human body are esterified in this position [25]. In the study, the distribution of fatty acids between the n-2 and n-1,3 positions of triacylglycerols was studied by enzymatic hydrolysis. The results are shown in Tables 2-4 for cranberry seed oil, black current seed oil and strawberry seed oils, respectively. position. The share of this acid in the sn-2 position was 34.01%. This oil also contained 21.63% of oleic acid (18:1 n-9c) in the internal position, with 44.82% share of this fatty acid in the sn-2 position. Alpha-linolenic acid (18:3 n-3) was present in the sn-2 position of triacylglycerglycerol in 13.47% with the share in this position reaching 29.90%. Black current seed oil contained 9.17% of gamma-linolenic acid (18:3 n-6) in the internal position, and its share in sn-2 position was detected at the level of 34.27%. The share of saturated fatty acids represented by palmitic fatty acid (16:0) in the internal position amounted to 18.57%. These results correspond to the studies of [PERSON] and [PERSON] [12], who obtained the following shares of fatty acids in the sn-2 position in black currant seed oil: linoleic acid 37.8%, oleic acid 47.5%, alpha-linolenic acid 16.3%, gamma-linolenic acid 37.4% and palmitic acid 19.5%. Strawberry seed oil was characterized by the highest content of linoleic acid (18:2 n-6c) in the internal position, i.e., 49.85%. The share of this acid in the sn-2 position was 37.76%. The share of alpha-linoleic acid (18:3 n-3) in the sn-2 position was 27.31%, while the content of this fatty acid in the internal position reached 24.38%. This oil contained also 20.82% of oleic acid (18:1 n-9c) in the internal position, the share of which in the sn-2 position was detected at the highest level of 40.21%. The share of saturated fatty acid (palmitic acid, 16:0) in the internal position was 25.25%. These results correspond to the studies of [PERSON] and [PERSON] [12], who obtained the following shares of fatty acids in the sn-2 position in strawberry seed oil: linoleic acid 40.2%, alpha-linolenic acid 29.1%, oleic acid 38.2%.