Co-administration of cannabidiol and L-theanine improves sleep-related outcomes in a caffeine-induced sleep disturbance mouse model
In a mouse model of caffeine-induced sleep disturbance, combined administration of CBD and L-theanine at ratios of 1:1, 2:1, or 1:2 significantly reduced sleep onset latency and increased total sleep duration compared to single treatments. The combination also elevated serum serotonin and melatonin levels by more than 40% and increased cortical GABA levels relative to caffeine-treated controls.
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Co-administration of cannabidiol and L-theanine improves sleep-related outcomes in a caffeine-induced sleep disturbance mouse model The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 24/100 (low).
The Claim
Co-administration of cannabidiol and L-theanine improves sleep-related outcomes in a caffeine-induced sleep disturbance mouse model
This conclusion is most relevant to: Caffeine-induced sleep disturbance mouse model.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Combined Administration of Cannabidiol and L-Theanine Improves Sleep-Related Outcomes in Caffeine-Induced Sleep Disturbances Mouse Model. (Biomolecules & therapeutics, 2026) —
How It Works
The proposed biological pathway:
- ▸CBD increases serotonin levels in a dose-dependent manner
- ▸L-theanine elevates serotonin at lower doses
- ▸Combination treatment elevates serum serotonin and melatonin by >40%
- ▸Combination treatment elevates cortical GABA levels
- ▸Result: Improved sleep onset latency and total sleep duration
Who Might Benefit
Evidence fit by population:
- ▸Caffeine-induced sleep disturbance mouse model
Recommended Dose
N/A (ratios of 1:1, 2:1, or 1:2 tested; lower doses showed synergistic interaction)
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Animal model, not directly generalizable to humans
- ▸Precise mechanisms remain to be determined
- ▸Synergistic interaction only observed at lower doses under normal conditions, not at higher doses
Frequently Asked Questions
What were the specific ratios of CBD to L-theanine tested?▼
The study tested ratios of 1:1, 2:1, and 1:2 (CBD:L-theanine).
Did the combination show synergy at all doses?▼
No, combination index analysis indicated a synergistic interaction only at lower doses under sleep-disturbed conditions; this was not observed at higher doses under normal conditions.
What neurochemical changes were associated with the combination treatment?▼
The combination treatment increased serum serotonin and melatonin levels by more than 40% relative to the caffeine-treated group, and also elevated cortical GABA levels.
Is this study applicable to humans?▼
No, this was a mouse model study, so results are preliminary and not directly applicable to humans without further clinical research.
References
- 1.Kim J, Yu YJ, Kim HK, Ullah A, Bappi MH, Shim HJ, Cheong J, Compomayor NB, Kim HJ, Chae HJ. “Combined Administration of Cannabidiol and L-Theanine Improves Sleep-Related Outcomes in Caffeine-Induced Sleep Disturbances Mouse Model..” Biomolecules & therapeutics, 2026. PMID: 42375087 DOI: 10.4062/biomolther.2025.160