Table 1: Fatty acid profile in overweight middle-aged men in the upper tertile of omega-3 index (HOI) compared to those in the two lower tertiles (LOI). All data are % wt/wt in erythrocyte membrane fatty acids and are presented as means ± standard deviations. Omega-3 index represents the sum of EPA + DHA concentrations. Statistically significant values at p < 0.05 are shown in bold

From: Higher omega-3 index is associated with increased insulin sensitivity and more favourable metabolic profile in middle-aged overweight men

 LOIHOIp-value
n3116 
C16:0 (palmitic acid)22.5 ± 0.822.4 ± 0.60.60
C16:1n-7 (palmitoleic acid)0.42 ± 0.140.41 ± 0.150.80
C18:0 (stearic acid)18.7 ± 0.818.1 ± 0.70.001
C18:1n-9 (oleic acid)14.3 ± 0.814.7 ±0.60.040
C18:1n-7 (cis-vaccenic acid)1.38 ± 0.201.37 ± 0.120.60
C18:2n-6 (linoleic acid)10.3 ± 1.49.5 ± 0.70.004
C18:3n-6 (γ-linolenic acid)0.23 ± 0.100.21 ± 0.070.56
C18:3n-3 (α-linolenic acid)0.17 ± 0.080.34 ± 0.860.37
C20:0 (arachidic acid)0.43 ± 0.220.41 ± 0.190.64
C20:1n-9 (eicosenoic acid)0.32 ± 0.180.34 ± 0.150.47
C20:2n-6 (eicosadienoic acid)0.38 ± 0.210.42 ± 0.200.27
C20:3n-6 (dihomo-γ-linolenic acid)2.25 ± 0.331.97 ± 0.430.001
C20:4n-6 (arachidonic acid)17.8 ± 1.215.7 ± 1.1<0.0001
C20:5n-3 (eicosapentaenoic acid)1.27 ± 0.362.10 ± 0.66<0.0001
C22:5n-3 (docosapentaenoic acid)3.78 ± 0.534.00 ± 0.590.073
C22:6n-3 (docosahexaenoic acid)5.83 ± 0.808.02 ± 1.26<0.0001
Omega-3 index7.1 ± 0.810.1 ± 1.5<0.0001