Study: Reishi Promotes Sleep Through Gut Microbiota and Serotonin Pathways—a neurotransmitter involved in mood and sleep regulation.
Study Design
Researchers administered Reishi extract to mice and examined changes in gut microbiota composition, serotonin levels, and sleep quality. They specifically tracked the gut-brain axis pathway to understand how the mushroom affects sleep.
Key Findings
Reishi improved sleep through a pathway that depends on gut microbiota. The mushroom altered gut bacteria composition, which in turn affected serotonin production and sleep quality. This provides mechanistic evidence for Reishi’s traditional reputation as a calming mushroom.
The Serotonin Connection
Approximately 95% of the body’s serotonin is produced in the gut, not the brain. By positively affecting gut bacteria, Reishi may indirectly support sleep through increased serotonin availability. This explains why gut health and sleep quality are so closely connected.
Implications for Use
This research suggests Reishi may work best when taken consistently over time to establish gut microbiome changes, rather than as an acute sleep aid taken only at bedtime. Building healthy gut bacteria takes time.
Limitations to Consider
This was an animal study, so direct translation to humans requires caution. Gut microbiome composition varies significantly between individuals, which may affect response to Reishi supplementation.
Citation
Yao, C., et al. (2021). Ganoderma lucidum promotes sleep through a gut microbiota-dependent and serotonin-involved pathway in mice. Scientific Reports, 11, 13660.