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Table 1 Weight % of fatty acids in dried blood spots at varying BHT concentrations over 28 days

From: Butylated hydroxytoluene can protect polyunsaturated fatty acids in dried blood spots from degradation for up to 8 weeks at room temperature

Name

0 d

1 d

3 d

7 d

14 d

21 d

28 d

 

0 mg/mL BHT

SFAs

42.1 ± 0.9a

40.2 ± 0.5a

49.2 ± 0.6b

54.1 ± 1.7c

56.0 ± 0.3c

54.3 ± 0.5c

54.9 ± 0.9c

MUFAs

18.0 ± 0.4a

18.7 ± 0.2a

22.3 ± 0.3c

21.3 ± 0.8bc

20.8 ± 0.3b

21.8 ± 0.4bc

22.3 ± 0.7c

N-6 FAs

34.0 ± 0.6a

35.4 ± 0.1b

23.9 ± 0.3c

20.1 ± 0.5d

18.3 ± 0.1e

19.0 ± 0.3de

18.2 ± 0.6e

N-3 FAs

4.17 ± 0.24a

4.14 ± 0.03a

1.98 ± 0.11b

1.45 ± 0.08c

1.30 ± 0.13c

1.63 ± 0.20bc

1.47 ± 0.15c

ARA

8.07 ± 0.14a

8.10 ± 0.17a

4.25 ± 0.07b

3.20 ± 0.14c

2.85 ± 0.07c

3.17 ± 0.10c

2.92 ± 0.22c

EPA

0.65 ± 0.10a

0.64 ± 0.04a

0.29 ± 0.02b

0.26 ± 0.03b

0.25 ± 0.05b

0.25 ± 0.02b

0.17 ± 0.02b

DHA

2.19 ± 0.09a

2.18 ± 0.03a

0.85 ± 0.05b

0.63 ± 0.04cd

0.55 ± 0.02d

0.73 ± 0.02cd

0.77 ± 0.06cd

PUFAs

38.1 ± 0.8a

39.5 ± 0.1b

25.9 ± 0.3c

21.5 ± 0.5d

19.6 ± 0.1e

20.6 ± 0.5de

19.6 ± 0.4e

HUFAs

14.1 ± 0.5a

14.1 ± 0.2a

7.59 ± 0.10b

5.60 ± 0.24cd

5.02 ± 0.22d

5.80 ± 0.08c

5.40 ± 0.19cd

 

2.5 mg/mL BHT

SFAs

37.1 ± 0.5a

37.1 ± 0.3a

37.6 ± 0.5ab

36.2 ± 0.7a

39.2 ± 0.2c

39.0 ± 0.8bc

40.9 ± 0.7d

MUFAs

19.0 ± 0.2ab

18.7 ± 0.4a

19.1 ± 0.4ab

19.8 ± 0.4c

19.6 ± 0.1bc

20.2 ± 0.2cd

20.7 ± 0.1d

N-6 FAs

36.7 ± 0.3a

36.0 ± 0.3a

35.9 ± 0.1a

36.3 ± 0.4a

34.9 ± 0.5b

34.8 ± 0.4b

32.3 ± 0.3c

N-3 FAs

4.43 ± 0.10a

4.32 ± 0.11ab

4.15 ± 0.17abc

4.35 ± 0.12ab

3.96 ± 0.07bc

3.79 ± 0.25c

2.84 ± 0.06d

ARA

9.12 ± 0.07a

8.43 ± 0.24b

8.28 ± 0.08b

8.40 ± 0.12b

8.08 ± 0.07b

7.56 ± 0.22c

5.98 ± 0.13d

EPA

0.71 ± 0.08a

0.73 ± 0.06a

0.68 ± 0.06a

0.66 ± 0.03ab

0.62 ± 0.02ab

0.63 ± 0.07ab

0.52 ± 0.01b

DHA

2.40 ± 0.19a

2.25 ± 0.10ab

2.17 ± 0.06ab

2.35 ± 0.06a

2.16 ± 0.05ab

1.95 ± 0.20b

1.42 ± 0.05c

PUFAs

41.1 ± 0.2a

40.3 ± 0.3ab

40.0 ± 0.3b

40.6 ± 0.4ab

38.9 ± 0.5c

38.6 ± 0.6c

35.1 ± 0.2d

HUFAs

15.7 ± 0.1a

14.8 ± 0.2bc

14.4 ± 0.2bc

14.9 ± 0.2b

14.2 ± 0.1c

13.4 ± 0.5d

10.4 ± 0.2e

 

5 mg/mL BHT

SFAs

36.6 ± 0.2

36.9 ± 0.4

37.6 ± 0.8

36.0 ± 0.4

37.9 ± 2.6

38.5 ± 0.9

39.0 ± 0.7

MUFAs

18.6 ± 0.2a

19.0 ± 0.1a

19.2 ± 0.2ab

19.5 ± 0.3ab

21.6 ± 2.4b

20.1 ± 0.6ab

20.4 ± 0.1ab

N-6 FAs

36.0 ± 0.5ab

36.7 ± 0.1a

35.7 ± 0.4abc

36.0 ± 0.5ab

34.2 ± 0.3c

34.8 ± 1.1bc

34.2 ± 0.2c

N-3 FAs

4.59 ± 0.28a

4.23 ± 0.07ab

4.07 ± 0.02bc

4.32 ± 0.08ab

3.73 ± 0.26c

4.16 ± 0.15abc

3.75 ± 0.13c

ARA

8.68 ± 0.15a

8.54 ± 0.19a

8.21 ± 0.11ab

8.53 ± 0.20a

7.60 ± 0.45b

8.35 ± 0.12a

7.72 ± 0.09ab

EPA

0.82 ± 0.08a

0.71 ± 0.03ab

0.62 ± 0.01b

0.66 ± 0.04b

0.60 ± 0.01b

0.62 ± 0.02b

0.61 ± 0.04b

DHA

2.41 ± 0.15a

2.28 ± 0.02a

2.16 ± 0.03ab

2.35 ± 0.03a

1.98 ± 0.19b

2.25 ± 0.11ab

1.96 ± 0.06b

PUFAs

40.6 ± 0.3a

41.0 ± 0.2a

39.7 ± 0.4ab

40.4 ± 0.6ab

37.9 ± 0.6c

39.0 ± 1.0bc

38.0 ± 0.2c

HUFAs

15.5 ± 0.2a

14.8 ± 0.3ab

14.3 ± 0.2bc

15.0 ± 0.3ab

13.2 ± 0.7d

14.8 ± 0.3ab

13.5 ± 0.1cd

  1. Values are means ± SD, n = 3. BHT, butylated hydroxytoluene; SFA, saturated fatty acid; MUFA, monounsaturated fatty acid; FA, fatty acid; n-6, omega-6; n-3, omega-3; ARA, arachidonic acid; EPA, eicosapentaenoic acid; DHA, docosahexaenoic acid; PUFA, polyunsaturated fatty acid; HUFA, highly unsaturated fatty acid. Values with different superscript letters within a row are significantly different by Tukey’s HSD post hoc procedure (P < 0.05) after a significant F-value by one-way ANOVA (P < 0.05).