Effects of Dietary Strawberry Supplementation on Antioxidant Biomarkers in Obese Adults with Above Optimal Serum Lipids
Table 3
Antioxidant enzyme activities and trace element status following a 12-week strawberry or placebo beverage supplementation.
Variable
LD-FDS
LD-C
HD-FDS
HD-C
()
()
()
()
Plasma antioxidant capacity (µmol/L)
0 wk
1.6 ± 0.2
1.7 ± 0.3
1.8 ± 0.3
1.5 ± 0.3
12 wk
2.9 ± 0.3
1.6 ± 0.3
3.1 ± 0.3
1.2 ± 0.2
Serum catalase (U/mL)
0 wk
38 ± 12
47 ± 11
52 ± 15
45 ± 20
12 wk
67 ± 23
32 ± 9
40 ± 13#
54 ± 18
Serum glutathione peroxidase (mU/mL)
0 wk
13.9 ± 4.0
13.7 ± 3.8
14.7 ± 4.5
12.4 ± 2.8
12 wk
13.2 ± 3.9
14.0 ± 4.7
14.6 ± 3.3
11.5 ± 2.0
Serum glutathione reductase (U/L)
0 wk
35.7 ± 17
30.5 ± 12
36.1 ± 9
40.4 ± 18
12 wk
45.1 ± 21
28.5 ± 17
32.6 ± 12
37.2 ± 21
Whole blood glutathione (µg/g Hb)
0 wk
1657 ± 57
1898 ± 52
1824 ± 38
1789 ± 63
12 wk
2295 ± 158
1775 ± 48
2860 ± 121
1862 ± 62
Plasma iron (mg/dL)
0 wk
0.9 ± 0.1
1.8 ± 0.6
1.0 ± 0.1
0.9 ± 0.1
12 wk
1.2 ± 0.1
1.0 ± 0.1
1.1 ± 0.2
1.3 ± 0.3
Plasma copper (mg/dL)
0 wk
1.3 ± 0.1
1.4 ± 0.2
1.8 ± 0.4
1.3 ± 0.1
12 wk
1.5 ± 0.1
1.6 ± 0.1
1.4 ± 0.1
1.5 ± 0.1
Plasma selenium (mg/dL)
0 wk
0.10 ± 0.02
0.14 ± 0.03
0.15 ± 0.02
0.13 ± 0.02
12 wk
0.09 ± 0.02
0.11 ± 0.03
0.14 ± 0.02
0.11 ± 0.03
Plasma zinc (mg/dL)
0 wk
1.1 ± 0.2
1.3 ± 0.3
1.2 ± 0.1
1.0 ± 0.2
12 wk
0.6 ± 0.1
0.9 ± 0.2
0.9 ± 0.2
1.0 ± 0.2
Values are mean ± SE. C, control; FDS, freeze-dried strawberries; Hb, hemoglobin; HD, high dose; LD, low dose; RBC, red blood cell; WBC, white blood cell. values are derived from the multivariate analysis of variance (MANOVA) assessing differences between strawberry and control groups at 0 and 12 wk of the study for each variable. versus respective controls; versus HD-FDS; versus HD-C.
