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Using CBD may help improve sleep quality, particularly in individuals with anxiety or sleep disturbances, but evidence is mixed and more high-quality research is needed.

### Effects of CBD on Sleep Quality
- Studies show that people using CBD, especially those with anxiety or affective symptoms, often report better sleep quality following CBD use, with some evidence suggesting that edible CBD products might provide the highest perceived improvement in sleep ((1)) ((2)).
- Clinical trials indicate that low doses of CBD (e.g., 15 mg daily) can improve subjective sleep quality with a favorable safety profile, but these improvements may not exceed those achieved by 5 mg melatonin ((3)) ((6)).
- CBD's calming effects on the central nervous system could contribute to improved sleep and reduced anxiety, as shown in retrospective case series where a significant portion of patients reported better sleep after CBD treatment ((8)).
- An 8-week study with 50 mg daily CBD supplementation found significant improvements in sleep quality in healthy young adults, measured objectively via questionnaires ((63)).

### Considerations and Limitations
- Many studies rely on self-reported sleep improvements rather than objective measures; therefore, effects on objective sleep architecture and long-term benefits are less clear ((7)) ((10)).
- Some research highlights different effects at varying doses: medium to high doses may increase REM sleep latency, while medium-low doses decrease it, suggesting a dose-dependent response ((10)).
- CBD combined with other cannabinoids or additives such as cannabinol (CBN) or cannabichromene (CBC) does not necessarily enhance sleep improvement beyond CBD alone ((5)) ((9)).
- Side effects are generally mild, and CBD does not typically cause intoxication or "high," differentiating it from THC, the psychoactive component of cannabis ((34)) ((42)).

### Summary
CBD can potentially help improve sleep quality, especially for those with anxiety or sleep difficulties, and it is generally safe at low to moderate doses. However, the degree of benefit may vary by individual, dosage, and product type, and its efficacy does not consistently surpass that of established aids like melatonin. More robust, long-term clinical research is needed to fully understand CBD's role in sleep enhancement.

If you are considering CBD for sleep improvement, consulting a healthcare professional is advisable to ensure safety and appropriateness for your specific situation.