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Changes in Urinary Hydrogen Peroxide and 8-Hydroxy-2′-Deoxyguanosine Levels after a Forest Walk: A Pilot Study

Author

Listed:
  • Da-Hong Wang

    (Department of Biochemistry, Okayama University of Science, Okayama, Okayama Prefecture 700-0005, Japan)

  • Ai Yamada

    (Department of Biochemistry, Okayama University of Science, Okayama, Okayama Prefecture 700-0005, Japan)

  • Masamitsu Miyanaga

    (Department of Biochemistry, Okayama University of Science, Okayama, Okayama Prefecture 700-0005, Japan)

Abstract

Some studies have shown that exposure to forests has positive effects on human health, although the mechanisms underlying the health benefits of a forest environment have not been elucidated yet. The current study was aimed at examining how the levels of urinary hydrogen peroxide (H 2 O 2 ) and 8-hydroxy-2’deoxyguanosine (8-OHdG) change after a forest or urban walk in healthy subjects. Twenty-eight volunteers (19 men and 9 women) participated in the study. The forest walks were carried out in a forest in Okayama Prefecture, Japan, and the urban walks (15 men and 7 women) were carried out in the downtown area of Okayama city, each for two hours. Spot urine samples were collected before the walk, the next day and one week after the forest or urban walk. Compared with pre-forest walk levels, urinary H 2 O 2 ( p < 0.1) and 8-OHdG ( p < 0.1) concentrations significantly decreased in the participants the day after the forest walk; furthermore, urinary 8-OHdG remained at a low level even at one week after the forest walk ( p < 0.05). However, there were no significant changes in the concentrations of these oxidative biomarkers after the urban walk. These findings suggest the possibility that exposure to forests may alleviate oxidative stress in the body.

Suggested Citation

  • Da-Hong Wang & Ai Yamada & Masamitsu Miyanaga, 2018. "Changes in Urinary Hydrogen Peroxide and 8-Hydroxy-2′-Deoxyguanosine Levels after a Forest Walk: A Pilot Study," IJERPH, MDPI, vol. 15(9), pages 1-9, August.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:9:p:1871-:d:166502
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    References listed on IDEAS

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    1. Hye-Jin Kim & Jin-Young Min & Hyun-Jin Kim & Kyoung-Bok Min, 2016. "Parks and Green Areas Are Associated with Decreased Risk for Hyperlipidemia," IJERPH, MDPI, vol. 13(12), pages 1-11, December.
    2. Su Geun Im & Han Choi & Yo-Han Jeon & Min-Kyu Song & Won Kim & Jong-Min Woo, 2016. "Comparison of Effect of Two-Hour Exposure to Forest and Urban Environments on Cytokine, Anti-Oxidant, and Stress Levels in Young Adults," IJERPH, MDPI, vol. 13(7), pages 1-11, June.
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    Cited by:

    1. Albert Bach Pagès & Josep Peñuelas & Jana Clarà & Joan Llusià & Ferran Campillo i López & Roser Maneja, 2020. "How Should Forests Be Characterized in Regard to Human Health? Evidence from Existing Literature," IJERPH, MDPI, vol. 17(3), pages 1-15, February.
    2. Ai Yamada & Yoshiko Sato & Tokushi Horike & Masamitsu Miyanaga & Da-Hong Wang, 2020. "Effects of a Forest Walk on Urinary Dityrosine and Hexanoyl-Lysine in Young People: A Pilot Study," IJERPH, MDPI, vol. 17(14), pages 1-10, July.

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