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Articles by Hirohiko Nakamura

Category : Research note

article id 223, category Research note
Bum-Jin Park, Takeshi Morikawa, Tomohiro Ogata, Kenji Washida, Mario Iwamoto, Hirohiko Nakamura, Yoshifumi Miyazaki. (2009). Physiological effects of ingesting eucalyptus essential oil with milk casein peptide. Silva Fennica vol. 43 no. 1 article id 223. https://doi.org/10.14214/sf.223
Keywords: relaxation; eucalyptus essential oil; POMS; salivary cortisol; type A behavior pattern
Abstract | View details | Full text in PDF | Author Info
This study was conducted to clarify the effect of eucalyptus essential oil mixed with milk casein peptide food for human physiological relaxation. Fifteen male university students (21.2 ± 0.9 yr) participated in study as subjects. The subjects were given one of two types of experimental drink (peptide + eucalyptus flavor (Pep + EF), and peptide + grapefruit·orange flavor (Pep + G·O), each flavor contains natural essential oil). We measured the change in salivary cortisol concentration and POMS scores before and two hours after taking experimental drink. The results of a Type A behavior pattern test were used to classify subjects. The concentration of salivary cortisol decreased significantly two hours after taking Pep + EF. And Type B showed bigger change than Type A. In conclusion, the results show that eucalyptus essential oil has the effect of relaxation, and that the effects on Type A and Type B are different.
  • Park, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: bjpark@faculty.chiba-u.jp (email)
  • Morikawa, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: tm@nn.jp
  • Ogata, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: to@nn.jp
  • Washida, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: kw@nn.jp
  • Iwamoto, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: mi@nn.jp
  • Nakamura, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: hn@nn.jp
  • Miyazaki, Chiba University, Center for Environment, Health and Field Sciences, 277-0882 Kashiwa, Chiba, Japan E-mail: ym@nn.jp

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