Research Study Abstract

Efficacy of Polygonatum sibiricum on Mild Insomnia: A Randomized Placebo-Controlled Trial

  • Published on July 25, 2019

Polygonatum sibiricum (PS) rhizome, which contains glyceryl-1-monolinoleate as its primary active component, has been shown to improve insomnia in animal models. Based on these findings, we aimed to investigate the safety and efficacy of PS rhizome extract in improving sleep quality in individuals with mild insomnia. Eighty individuals with mild insomnia were enrolled in a four-week, randomized, double-blind, placebo-controlled trial of PS rhizome extract (500 mg/day, n = 40, PS group) or placebo (n = 40, placebo group). The primary outcome measure was change in total score on the Athens Insomnia Scale (AIS) to indicate sleep quality. The secondary outcome measures included change in actigraphy data and perfusion levels in the brain regions within the default mode network (DMN), which is known to play a key role in insomnia. The PS group showed greater improvement in the total AIS score with a significant increase in total sleep time, relative to the placebo group. In addition, significant group-by-visit interactions were observed in the perfusion level of the medial prefrontal cortex within the DMN. Findings of the current study provide first evidence that PS rhizome extract could be an effective natural ingredient for improving sleep in mild insomnia using a human model.


  • Eunji Ha 1,2
  • Haejin Hong 1,2
  • Tammy D. Kim 1,2
  • Gahae Hong 2
  • Suji Lee 1,2
  • Seunghee Kim 1,2
  • Nayeon Kim 1,2
  • Sang Duck Jeon 3
  • Chang-Won Ahn 3
  • Hun Jung Kim 3
  • Young-Jin Lee 3
  • Sujung Yoon 1,2
  • Geon Ha Kim 2,4
  • Jungyoon Kim 1,2


  • 1

    Department of Brain and Cognitive Sciences, Ewha Womans University, Seoul 03760, Korea

  • 2

    Ewha Brain Institute, Ewha Womans University, Seoul 03760, Korea

  • 3

    Nongshim Corporation, Seoul 07057, Korea

  • 4

    Department of Neurology, Ewha Womans University College of Medicine, Ewha Womans University Mokdong Hospital, Seoul 07985, Korea



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