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Evid Based Complement Alternat Med. 2014;2014:974840. doi: 10.1155/2014/974840. Epub 2014 Jul 08.

Effects of young barley leaf powder on gastrointestinal functions in rats and its efficacy-related physicochemical properties.

Evidence-based complementary and alternative medicine : eCAM

Motoya Ikeguchi, Masahito Tsubata, Akira Takano, Tomoyasu Kamiya, Kinya Takagaki, Hideyuki Ito, Yohko Sugawa-Katayama, Hideaki Tsuji

Affiliations

  1. Research and Development Division, Toyo Shinyaku Co. Ltd., 7-28 Yayoigaoka, Tosu-shi, Saga 841-0005, Japan.
  2. Faculty of Health and Welfare Science, Okayama Prefectural University, 111 Kuboki, Soja-shi, Okayama 719-1197, Japan.
  3. Department of Health and Nutrition, Osaka Aoyama University, 2-11-1 Niina, Minoh-shi, Osaka 562-8580, Japan.

PMID: 25114709 PMCID: PMC4119638 DOI: 10.1155/2014/974840

Abstract

Young barley leaf is consumed as a popular green-colored drink, which is named "Aojiru" in Japan. In the present study, we examined effects of young barley leaf powder (BL) on gastrointestinal transit time (GTT) and fecal moisture and weight in comparison with wheat bran (WB) in male Sprague-Dawley rats. In addition, an attempt was made to identify BL components responsible for these effects by using various fractions of BL. Additionally, we examined the water-holding capacity and setting volume of BL in vitro. We also examined the granular structures of BL with a scanning electron microscope. As a result, BL supplementation in the diet increased the fecal weight and shortened GTT. Our results demonstrate that the active component responsible for the effect on increasing the fecal volume in BL is the water-insoluble dietary fiber fraction and that this effect is thought to be caused by stimulation of the gut tract by the pH lowering. Furthermore, the high laxative action of BL was thought to be ascribable to the high water-holding capacity due to the complicated structures of BL.

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