Written by the Nuvirox Research Team
Key points
- A 321-participant randomized trial found 20 mg CBN reduced nighttime awakenings and overall sleep disturbance, but not sleep-onset latency, versus placebo.
- A newer 1,000-plus-participant dose-ranging trial found CBN performed comparably to 4 mg melatonin, not better, across three tested doses.
- A formal scientific review found most older CBN research is decades old, small, and insufficient to support the sleep claims made about it — the 2023–2024 trials are a genuine but still limited improvement.
Short answer: promising but early — CBN (cannabinol) has real, recent human trial data supporting a role in reducing nighttime awakenings, but the evidence for helping you fall asleep faster is much thinner, and a lot of the marketing runs ahead of the science. The honest caveat: the strongest human trial to date is a single company-funded study, and a formal review of the older literature found insufficient published evidence to support most sleep-related claims prior to 2023.
What actually is CBN, and how is it different from CBD?
CBN, or cannabinol, forms naturally as THC oxidizes and ages — it isn't produced in large quantities directly by the hemp plant the way CBD is, which is part of why aged cannabis has long had a folk reputation for being sleepier. Unlike THC, CBN isn't significantly intoxicating on its own, and it acts as a partial agonist at CB1 cannabinoid receptors, with roughly a tenth of THC's potency at that receptor.
What does the best human trial actually show?
A randomized, placebo-controlled trial of 321 participants who rated their own sleep as 'poor' or 'very poor' tested 20 mg of oral CBN, a combined CBN-plus-CBD dose, and placebo, taken as gummies 90 minutes before bed for seven days. Participants receiving 20 mg CBN alone showed reduced nighttime awakenings and overall sleep disturbance relative to placebo, with only mild side effects such as headache. Notably, adding CBD to the CBN did not improve on CBN alone — an honest finding that runs against how many combination products are marketed.
Study snapshot: 20 mg CBN sleep trial
| Design | Randomized, placebo-controlled, parallel-group |
| n | 321 adults with self-rated poor sleep |
| Duration | 7 nights |
| Dose | 20 mg CBN via gummy, 90 minutes before bed |
| Finding | Reduced nighttime awakenings and overall sleep disturbance vs. placebo; sleep-onset latency not significantly improved |
What about the newer dose-ranging trial?
A separate randomized, double-blind trial compared three CBN doses (25, 50, and 100 mg) against both placebo and 4 mg of melatonin in just over 1,000 total participants. All CBN dose groups and the melatonin group showed significant improvement in sleep quality relative to placebo, but there were no significant differences between any CBN dose and the melatonin comparator — in other words, CBN performed roughly on par with melatonin in that trial, not better.
Does the animal research actually support a mechanism?
Yes, and it's genuinely new: a 2024 study from the University of Sydney's Lambert Initiative was the first to use objective sleep measures (EEG) to show CBN increases both non-REM and REM sleep in rats, with evidence of a biphasic effect — initial sleep suppression before a marked increase in total sleep time. Human trials, including a registered protocol known as the CUPID study, are following up on this preclinical signal directly.
What's the honest counterweight here?
A formal scientific review examining CBN and sleep found that most published human studies date to the 1970s and 1980s, used small and non-diverse samples, and rarely used validated sleep questionnaires or polysomnography. The review's conclusion was blunt: there is insufficient published evidence to support most sleep-related marketing claims made about CBN, and it called for more randomized controlled trials. The 2023–2024 trials above are a real step forward, but they don't erase that gap — they're still a small number of studies, some of them industry-sponsored.
Is CBN legal, and does it interact with anything?
CBN's legal status generally mirrors hemp-derived cannabinoid regulation in a given state or country, which varies and changes; check local rules before purchasing. Because CBN works on the same cannabinoid-receptor system as other sedating compounds, combining it with other sedatives — including sleep supplements that already contain melatonin, GABA, or St. John's Wort — hasn't been specifically studied for added sedation risk, so stacking multiple sedating products on the same night is worth avoiding without medical input.
What actually helps, practically?
Based on the trial data above, 20 mg appears to be the most-studied dose for sleep-maintenance benefits specifically, taken roughly 90 minutes before bed. If sleep-onset difficulty (trouble falling asleep in the first place) is the main complaint rather than nighttime waking, the current trial evidence doesn't clearly support CBN over other, more established options.
What do the two trials agree and disagree on?
Both trials agree CBN beats placebo for overall sleep disturbance. Where they part ways is dose: the 20 mg trial was the only dose tested in that study, while the dose-ranging trial found no added benefit going from 25 mg up to 100 mg over the melatonin comparator, suggesting more CBN isn't necessarily better once you're past an initial effective range — a pattern seen with several other sedating compounds.
For related reading, see our coverage of how CBD compares on the same sleep-disturbance measures, reishi mushroom, another trendy sedating botanical, and what dose of melatonin is actually appropriate.
Frequently asked questions
Does CBN get you high like THC?
No — CBN is not significantly intoxicating on its own at studied doses, though it does act on some of the same cannabinoid receptors as THC, at much lower potency.
Is CBN better than melatonin for sleep?
The best current dose-ranging trial found CBN performed comparably to 4 mg of melatonin, not better than it, across three different CBN doses tested.
Does combining CBD with CBN make it work better?
The 321-participant trial found adding CBD to 20 mg CBN did not improve results compared with CBN alone — a finding that runs against how many combination products are marketed.
Is CBN safe to take every night?
The published trials studied CBN over 7 nights with only mild reported side effects like headache; long-term nightly use over months or years hasn't been specifically studied in controlled trials yet.
From Nuvirox
Why we formulated Sleep+ Restore
Sleep+ Restore is a 905 mg proprietary blend built around L-tryptophan, L-theanine, chamomile, passionflower, ashwagandha, GABA, 5-HTP, and St. John’s Wort, plus 10 mg of melatonin per serving — formulated for people who want one evening routine rather than five separate bottles.
It’s backed by a 60-day money-back guarantee, long enough to actually evaluate whether a nightly routine helps, rather than judging it after a single night.
If sleep problems are tied to a specific medical condition, medication, grief, or life circumstance described in this article, please talk with a doctor, therapist, or pharmacist before adding any new supplement — including this one.
The bottom line
CBN has moved from folklore to genuine, recent human trial data faster than almost any other trendy sleep ingredient — but the honest read is that it looks roughly comparable to melatonin for sleep maintenance, not a clear upgrade, and the older literature behind it is thin. If you want to try a cannabinoid alongside your routine, treat it as one variable at a time rather than layering it onto every other sedating supplement you take. Sleep+ Restore's melatonin-based formula reflects the much larger and longer-running evidence base for melatonin specifically.
References
- Lavender I, McCartney D, Marshall N, et al. A sleepy cannabis constituent: cannabinol and its active metabolite influence sleep architecture in rats. Neuropsychopharmacology. 2024. DOI: 10.1038/s41386-024-02018-7
- Bonn-Miller MO, et al. Clinical trial: nighttime use of cannabinol (CBN) reduces sleep disturbances (20 mg CBN, n=321, placebo-controlled). Experimental and Clinical Psychopharmacology, 2023 (reported via NORML, Oct. 2023).
- A Randomized, Double-Blind, Placebo-Controlled Trial to Assess the Effectiveness and Safety of Melatonin and Three Formulations of TruCBN for Improving Sleep. PMC11357382.
- Cannabinol and Sleep: Separating Fact from Fiction. PubMed PMID: 34468204 (review noting insufficient published RCT evidence prior to 2023–2024 trials).
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.