Association of dietary antioxidant index with body mass index in adolescents

Bahareh Aminnejad, Zahra Roumi, Naeemeh Hasanpour Ardekanizadeh, Farhad Vahid, Maryam Gholamalizadeh, Naser Kalantari, Asal Ataei*, Saeid Doaei

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background: Dietary antioxidants may decrease body fat through reduction of oxidative stress. This study aimed to examine the association between dietary antioxidant index (DAI) and body mass index (BMI) in adolescent boys. Methods: In this cross-sectional study, 593 adolescent boys aged 12–16 years were randomly selected and were divided into two groups of overweight and non-overweight individuals. Data on physical activity and anthropometric measurements were collected. Dietary intake was assessed using 168-item semi quantitative food frequency questionnaire and the DAI score was calculated to measure the antioxidant capacity of the diet. Results: The overweight adolescents had higher intake of energy (2490.55 ± 632.49 vs. 2354.33 ± 632.64 kcal/d, p = 0.01), carbohydrate (290.21 ± 71.41 vs. 272.93 ± 79.22 g/d, p = 0.01), fat (111.51 ± 40.76 vs. 104.51 ± 35.56 g/d, p = 0.04), calcium (811.70 ± 283.70 vs. 741.06 ± 251.17 g/d, p = 0.003), and vitamin D (1.41 ± 1.17 vs. 1.18 ± 1.19 μg/d, p = 0.031) in comparison with normal weight adolescents. The DAI had an inverse association with BMI after adjustment for age and caloric intake (OR: 0.85, 95% CI: 0.76–0.96, p = 0.009). Additional adjustment for dietary intake of vitamin A, vitamin E, vitamin C, zinc, manganese, and selenium did not change the results. Conclusion: The results of the study showed that following a diet rich in antioxidants may be effective in preventing obesity in adolescent boys. Further longitudinal studies are needed to confirm these finding and to determine the underlying mechanisms.

Original languageEnglish
JournalObesity Science and Practice
Early online date26 Sep 2022
DOIs
Publication statusE-pub ahead of print - 26 Sep 2022

Keywords

  • adolescents
  • boys
  • dietary antioxidant
  • obesity

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