L-Theanine Improves Sleep Quality Without Side Effects
Yes, L-Theanine helps improve sleep quality by significantly reducing time to fall asleep, increasing total sleep duration, and enhancing sleep efficiency without serious adverse effects.
- L-Theanine boosts GABA and serotonin to induce calm without drowsiness.
- Reduces time to fall asleep, aiding quicker entry into rest.
| Claim | Scientific Observation | Impact Magnitude | Source | ||
|---|---|---|---|---|---|
| L-Theanine improves subjective sleep quality | Standardized mean difference in sleep scores | SMD = -0.83 (P < 0.05) | Xiaojie An et al. (2024), Frontiers in Nutrition | ||
| L-Theanine reduces time to fall asleep | Sleep latency in RCTs | Significant reduction | Xiaojie An et al. (2024), Frontiers in Nutrition | ||
| L-Theanine increases total sleep duration | Overall sleep time | Significant increase | Xiaojie An et al. (2024), Frontiers in Nutrition | ||
| L-Theanine raises sleep efficiency | Proportion of restful sleep | Significant improvement (P < 0.05) | Xiaojie An et al. (2024), Frontiers in Nutrition |