Effects of ginger koji intake on skin surface temperature for young women sensitive to cold temperatures.

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  • KAWABATA Yukina
    <i>Department of Biosphere Sciences, School of Human Science, Kobe College</i>
  • KANAOKA Misato
    <i>Department of Biosphere Sciences, School of Human Science, Kobe College</i>
  • BOGAKI Chika
    <i>Department of Biosphere Sciences, School of Human Science, Kobe College</i>
  • SUZUKI Kyoko
    <i>Department of Biosphere Sciences, School of Human Science, Kobe College</i>
  • IGUCHI Takafumi
    <i>Yaegaki Bio-industry, Inc.</i>
  • TAKAOKA Motoko
    <i>Department of Biosphere Sciences, School of Human Science, Kobe College</i>
  • WATANABE Toshiro
    <i>Yaegaki Bio-industry, Inc.</i>

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  • 冷え性女性の皮膚表面温度におけるショウガ麹の効果
  • ヒエショウ ジョセイ ノ ヒフ ヒョウメン オンド ニ オケル ショウガ コウジ ノ コウカ

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Abstract

This study investigated the effect of ginger koji powder on sensitivity to cold temperatures among young women. Ginger koji is an enzyme-rich food which is produced by solid-state fermentation with Aspergillus oryzae in ginger chips. Ginger koji powder (500mg/2cp), ginger powder (500mg/2cp), or a placebo (cellulose, 500mg/2cp) was adminite to 5 women (20.6±0.4 years old) with cold fingertips using a double-blind placebo-controlled crossover protocol. The combined effect with a milk protein drink was investigated. Twenty minutes after a single administration, the hand of each subject was exposed to cooling at 20°C for 1min, and then the skin surface temperature on the hand along with the width of blood vessels in their fingers were measured. In the case of a single administration of ginger koji, the recovery rates of hand temperature were significantly higher than those in the placebo group. In addition, after a single administration of a combination of a milk protein drink and ginger koji, hand temperature recovery time was shorter than in the placebo group. It can therefore be suggested that the administration of both a milk protein drink and ginger koji leads to an increase in diet-induced thermogenesis, and subsequently the recovery of skin surface temperature. Our findings suggested that ginger koji can be helpful for women sensitive to cold temperatures.

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