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Article

Effects of Euglena gracilis Intake on Mood and Autonomic Activity under Mental Workload, and Subjective Sleep Quality: A Randomized, Double-Blind, Placebo-Controlled Trial

1
Euglena Co. Ltd., Tokyo 108-0014, Japan
2
Miura Clinic, Medical Corporation Kanonkai, Osaka 530-0044, Japan
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(11), 3243; https://doi.org/10.3390/nu12113243
Received: 23 August 2020 / Revised: 18 October 2020 / Accepted: 20 October 2020 / Published: 23 October 2020
(This article belongs to the Special Issue New Research in Dietary Supplements and Healthy Foods)
While the human body maintains homeostasis by altering the balance in the autonomic nervous, endocrine, and immune systems, a prolonged imbalance in these systems can result in physical and mental symptoms, including a decline in sleep quality and work efficiency. Euglenagracilis (Euglena) is a single-celled microalga with the properties of both plants and animals and contains abundant nutrients, such as vitamins, minerals, amino acids, and fatty acids, which have various beneficial health effects. This study evaluated the effects of Euglena intake on the mood states and stress coping under mental workload tasks, and subjective sleep quality. We assigned men and women aged 20 to 64 years to Euglena and placebo intake groups, and measured indices related to the autonomic nervous system, psychological states, and sleep quality together with the application of workload stress before food intake, and 4, 8, and 12 weeks after commencing intake. Euglena intake regulated the autonomic nervous system under a workload and improved psychological parameters and sleep conditions. These results indicate that the consumption of Euglena may regulate the balance of the autonomic nervous system during stress and may have a favorable effect on psychological status and sleep quality. View Full-Text
Keywords: Euglena gracilis; paramylon; autonomic nervous system Euglena gracilis; paramylon; autonomic nervous system
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MDPI and ACS Style

Nakashima, A.; Yasuda, K.; Murata, A.; Suzuki, K.; Miura, N. Effects of Euglena gracilis Intake on Mood and Autonomic Activity under Mental Workload, and Subjective Sleep Quality: A Randomized, Double-Blind, Placebo-Controlled Trial. Nutrients 2020, 12, 3243. https://doi.org/10.3390/nu12113243

AMA Style

Nakashima A, Yasuda K, Murata A, Suzuki K, Miura N. Effects of Euglena gracilis Intake on Mood and Autonomic Activity under Mental Workload, and Subjective Sleep Quality: A Randomized, Double-Blind, Placebo-Controlled Trial. Nutrients. 2020; 12(11):3243. https://doi.org/10.3390/nu12113243

Chicago/Turabian Style

Nakashima, Ayaka, Kosuke Yasuda, Ako Murata, Kengo Suzuki, and Naoki Miura. 2020. "Effects of Euglena gracilis Intake on Mood and Autonomic Activity under Mental Workload, and Subjective Sleep Quality: A Randomized, Double-Blind, Placebo-Controlled Trial" Nutrients 12, no. 11: 3243. https://doi.org/10.3390/nu12113243

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