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- Title
Dietary total antioxidant capacity from different assays in relation to serum C-reactive protein among young Japanese women.
- Authors
Satomi Kobayashi; Kentaro Murakami; Satoshi Sasaki; Kazuhiro Uenishi; Mitsuyo Yamasaki; Hitomi Hayabuchi; Toshinao Goda; Jun Oka; Keiko Baba; Kazuko Ohki; Reiko Watanabe; Yoshiko Sugiyamama
- Abstract
Background: The association between dietary total antioxidant capacity (TAC) from different assays and serum C-reactive protein (CRP) has not been assessed in non-Western populations. We examined the association between dietary TAC and serum CRP concentration in young Japanese women using different four TAC assays. Methods: The subjects were 443 young Japanese women aged 18-22 years. Dietary TAC was assessed with a self-administered diet history questionnaire and the TAC value of each food using the following four assays: ferric reducing ability of plasma (FRAP); oxygen radical absorbance capacity (ORAC); Trolox equivalent antioxidant capacity (TEAC); and total radical-trapping antioxidant parameter (TRAP). Serum CRP concentrations were measured by highly sensitive nephelometry. Results: The major contributor to dietary TAC was green, barley, and oolong tea (FRAP: 53%, ORAC: 45%, TEAC: 36%, and TRAP: 44%). The prevalence of elevated CRP concentrations (? 1 mg/L) was 5.6%. TAC from FRAP was inversely associated with serum CRP concentrations (adjusted odds ratio [OR] for elevated CRP concentration in high [compared with low] dietary TAC group: 0.39 [95% confidence interval (CI): 0.16-0.98]; P = 0.04). TAC from ORAC was inversely associated with CRP, although the association was not significant (OR: 0.48 [95% CI: 0.20-1.14]; P = 0.10). TAC from TEAC was inversely associated with CRP (OR: 0.32 [95% CI: 0.12-0.82]; P = 0.02), as was TAC from TRAP (OR: 0.31 [95% CI: 0.12-0.81]; P = 0.02). Conclusions: Dietary TAC was inversely associated with serum CRP concentration in young Japanese women regardless of assay. Further studies are needed in other populations to confirm these results.
- Subjects
C-reactive protein; ANTIOXIDANTS; JAPANESE women; CONFIDENCE intervals; SERUM; BARLEY
- Publication
Nutrition Journal, 2012, Vol 11, p91
- ISSN
1475-2891
- Publication type
Article
- DOI
10.1186/1475-2891-11-91