Table 1 Comparison between whole blood and cerebrospinal fluid fatty acids levels

C16:0

palmitic acid

23.37 (0.43)

18.77

27.68

27.88 (0.76)

14.77

55.55

C16:1n-7

palmitoleic acid

2.56 (0.15)

0.75

4.43

2.71 (0.18)

0.89

7.24

C18:0

stearic acid

8.68 (0.28)

6.59

11.55

18.70 (0.78)

9.79

41.11

C18:1n-7

vaccenic acid

2.22 (0.08)

1.48

3.31

3.76 (0.17)

0.00

7.61

C18:1n-9

oleic acid^c

21.21 (0.50)

15.8

26.17

25.48 (0.61)

11.74

33.94

C18:2n-6

linoleic acid

20.40 (0.53)

13.33

26.04

7.01 (0.33)

2.87

17.47

C18:3n-3

alpha-linolenic acid

0.74 (0.04)

0.46

1.42

2.54 (0.26)

0.59

16.14

C18:3n-6

gamma-linolenic acid

1.52 (0.06)

0.98

2.06

ND

-

-

C20:0

arachidic acid

0.26 (0.02)

0.12

0.51

ND

-

-

C20:1n-9

eicosenoic acid

0.24 (0.01)

0.17

0.37

1.21 (0.14)

0.00

6.14

C20:2n-6

eicosadienoic acid

1.17 (0.08)

0.30

2.01

ND

-

-

C20:3n-6

dihomo-gamma-linolenic acid

1.73 (0.05)

1.07

2.31

1.02 (0.12)

0.00

4.84

C20:4n-6

arachidonic acid^b

8.00 (0.38)

4.78

12.47

3.47 (0.20)

0.99

9.00

C20:5n-3

eicosapentaenoic acid

2.01 (0.15)

1.04

3.87

1.87 (0.28)

0.00

10.66

C22:5n-3

docosapentaenoic acid^c

1.98 (0.10)

1.06

3.17

2.94 (0.18)

0.84

8.46

C22:6n-3

docosahexaenoic acid^c

3.91 (0.17)

2.54

5.92

1.41 (0.12)

0.00

5.70

Total SFA

32.31 (0.28)

29.06

35.20

46.58 (1.27)

24.57

75.94

Total MUFA^b

26.26 (0.57)

18.92

31.71

33.16 (0.69)

14.55

41.21

Total omega-3 PUFA^c

8.64 (0.33)

6.05

12.66

8.76 (0.55)

2.65

28.52

Total omega-6 PUFA

32.80 (0.53)

25.63

38.79

11.50 (0.49)

4.85

23.53

Ratio omega-6:omega-3

3.92 (0.13)

2.73

5.54

1.47 (0.07)

0.41

3.45