Effects of a Fermented Sake Lees Product and Kwanso Concentrated Extract on Morning Drowsiness in Physically and Mentally Healthy Japanese Adults

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Consumption of a fermented sake lees product and kwanso concentrated extract significantly improves morning drowsiness in physically and mentally healthy Japanese adults. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

Junyoo Takizawa; Naoko Suzuki; Tsuyoshi Takara

doi:10.4327/jsnfs.79.65

January 1, 2026Nippon Eiyo Shokuryo GakkaishiOpen Access

Effects of a Fermented Sake Lees Product and Kwanso Concentrated Extract on Morning Drowsiness in Physically and Mentally Healthy Japanese Adults

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Key Points

The research aimed to evaluate the effects of a fermented sake lees product and kwanso extract on morning drowsiness in healthy adults.
Study with 112 participants consuming either the test foods or placebo for 12 weeks.
Participants took five capsules before bedtime daily.
Sleep quality was assessed using OSA-MA and PSQI-J questionnaires.
Fatigue and mood state were also evaluated using salivary amylase and tympanic temperature measurements.
Significant improvement in the OSA-MA measured 'morning drowsiness' after 12 weeks of test food intake.
Group differences observed in 'sleep duration' and some sub-items on the OSA-MA post-intervention.
PSQI-J overall scores showed significant differences between groups.

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Implication

This trial demonstrates improved sleep quality through food interventions in healthy Japanese adults, suggesting potential benefits.

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Cite This Study

Takizawa et al. (2026) studied this question.

synapsesocial.com/papers/69a52920f1e85e5c73bf076c https://doi.org/10.4327/jsnfs.79.65

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Effects of a Fermented Sake Lees Product and Kwanso Concentrated Extract on Morning Drowsiness in Physically and Mentally Healthy Japanese Adults

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Effects of a Fermented Sake Lees Product and Kwanso Concentrated Extract on Morning Drowsiness in Physically and Mentally Healthy Japanese Adults

Key Points

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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