NutriDex

The Supplement Research Compendium
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CBN (Cannabinol)

The "sleep cannabinoid" — popular hype, thin human proof.

Mixed evidence 🌙Sleep & Mood

✚ Updated · How we grade evidence

Evidence tier
Mixed
Research weight
Citations
8 verified / 8
Classification
Sleep & Mood
❝
What the evidence says. Graded mixed: the best-designed objective trial (polysomnography, insomnia) missed its primary endpoint, and positive signals are mostly subjective or in combination products — so the popular 'sleep cannabinoid' reputation outruns the human data. (Mixed evidence: Conflicting results across studies; benefit uncertain.)

What is CBN (Cannabinol)?

CBN (Cannabinol) is a sleep and mood supplement used for marketed sleep aid. NutriDex grades the human evidence as Mixed. Cannabinol (CBN) is a mildly sedating, non-intoxicating breakdown product of THC, heavily marketed as a natural sleep aid. The strongest objective test — a randomized polysomnography crossover in 20 insomnia patients — found that single 30 mg and 300 mg doses did NOT significantly reduce wake-after-sleep-onset (the primary outcome), though 300 mg modestly shortened sleep onset latency (p=0.004) and improved subjective sleep quality (p=0.005). A 293-person home trial of 20 mg CBN ± CBD found only a non-significant trend for sleep quality (p=0.082) but did cut nighttime awakenings and disturbance. A large industry trial of 25–100 mg CBN beat placebo on a sleep-disturbance scale, matching 4 mg melatonin, yet no dose differed from placebo on the clinically important threshold. A 2025 meta-analysis found non-CBD cannabinoids improved subjective sleep (SMD 0.53). Net: plausible mild benefit, but mixed and mostly subjective.

Purported Benefits

✓Marketed sleep aid
✓May ease nighttime awakenings
✓Mild, non-intoxicating relaxant
✓Possible adjunct for pain (in combos)

Evidence by outcome

The same supplement can be well-proven for one use and unproven for another — here is the human evidence graded outcome by outcome.

OutcomeEvidenceEffectStudies
Objective sleep (wake-after-sleep-onset)Polysomnography crossover RCT: 30/300 mg missed the primary WASO outcome vs placebo. Moderate — no effect · negligible 1
Subjective sleep qualitySome trials/meta-analysis show subjective improvement, but key RCTs missed clinically important thresholds. Mixed ↔ mixed · small 3
Nighttime awakeningsOne n=293 home trial cut awakenings (p=0.025) though overall sleep-quality trend was non-significant. Preliminary ↑ benefit · small 1
Neuropathic pain (in combination)Topical THC:CBD:CBN cut diabetic neuropathy pain, but CBN was a minor component, not tested alone. Preliminary ↑ benefit · moderate 1

Dosing & Compounds

Typical Dose
Most sleep trials used 20–100 mg oral CBN at night (one study used 300 mg); no consensus effective dose is established.
Active Compounds
Cannabinol (CBN)Active metabolite 11-OH-CBN

Safety & Cautions

Short trials report CBN is generally well tolerated; common effects are next-morning grogginess, headache, altered taste and sleepiness, with safety established only up to ~7 days. Because CBN is metabolized by liver CYP450 enzymes, it can theoretically interact with drugs sharing that pathway and may add to the sedation of alcohol, benzodiazepines, opioids, sedating antihistamines and other CNS depressants. CBN can trigger a positive THC urine screen. Avoid in pregnancy and breastfeeding (untested), and treat hemp-derived products cautiously as potency and purity are poorly regulated. Educational only — always check with your doctor or pharmacist before combining CBN (Cannabinol) with any medicine.

Key Studies

Meta-analysis Sleep Med Reviews meta-analysis 2025 ✓ PubMed
Across 6 RCTs (n=1077), cannabinoids improved subjective sleep quality vs placebo (SMD 0.53, 95% CI 0.03–1.02); non-CBD cannabinoids drove the effect.
RCT Lavender 2026 (CUPID) ✓ PubMed
Single 30/300 mg CBN did NOT cut wake-after-sleep-onset vs placebo (primary outcome null); 300 mg shortened sleep onset (p=0.004) & raised subjective quality (n=20).
RCT Bonn-Miller 2024 ✓ PubMed
20 mg CBN for 7 nights gave only a non-significant sleep-quality trend (p=0.082) but significantly reduced nighttime awakenings (p=0.025) and disturbance; added CBD didn't help (n=293).
RCT Saleska 2024 (TruCBN) ✓ Full text
25/50/100 mg CBN all beat placebo on PROMIS sleep-disturbance and matched 4 mg melatonin; no dose differed from placebo on the clinically important threshold (n=1020).
RCT Lavender 2023 (CUPID protocol) ✓ PubMed
Protocol for the randomized, double-blind, placebo-controlled polysomnography crossover of 30 & 300 mg CBN in clinician-diagnosed insomnia; WASO as primary outcome.
RCT Sangmanee 2024 (transdermal combo) ✓ Full text
Phase III topical THC:CBD:CBN (CBN minor component) cut diabetic neuropathy pain by ~17 points vs placebo over 12 weeks (p<0.001, n=100) — combination, not CBN alone.
Review Maioli 2024 review ✓ Full text
Comprehensive pharmacology review: CBN is a low-CB1-affinity THC oxidation product, metabolized by CYP450/UGT to the more active 11-OH-CBN; clinical evidence remains limited.
Review Kaul 2021 review ✓ PubMed
Critical review of cannabinoids for sleep concludes evidence is weak — small samples, sleep often a secondary outcome, few validated/objective measures.
8 sources cited · 8 verified Search all studies on PubMed ↗

Common questions about CBN (Cannabinol)

What is CBN (Cannabinol) used for?

CBN (Cannabinol) is most often taken for Marketed sleep aid, May ease nighttime awakenings, Mild, non-intoxicating relaxant, Possible adjunct for pain (in combos). The "sleep cannabinoid" — popular hype, thin human proof.

Does CBN (Cannabinol) work — what does the evidence say?

Mixed evidence. Conflicting results across studies; benefit uncertain. Cannabinol (CBN) is a mildly sedating, non-intoxicating breakdown product of THC, heavily marketed as a natural sleep aid. The strongest objective test — a randomized polysomnography crossover in 20 insomnia patients — found that single 30 mg and 300 mg doses did NOT significantly reduce wake-after-sleep-onset (the primary outcome), though 300 mg modestly shortened sleep onset latency (p=0.004) and improved subjective sleep quality (p=0.005). A 293-person home trial of 20 mg CBN ± CBD found only a non-significant trend for sleep quality (p=0.082) but did cut nighttime awakenings and disturbance. A large industry trial of 25–100 mg CBN beat placebo on a sleep-disturbance scale, matching 4 mg melatonin, yet no dose differed from placebo on the clinically important threshold. A 2025 meta-analysis found non-CBD cannabinoids improved subjective sleep (SMD 0.53). Net: plausible mild benefit, but mixed and mostly subjective.

What is the typical dose of CBN (Cannabinol)?

Most sleep trials used 20–100 mg oral CBN at night (one study used 300 mg); no consensus effective dose is established.

Is CBN (Cannabinol) safe? Any cautions or side effects?

Short trials report CBN is generally well tolerated; common effects are next-morning grogginess, headache, altered taste and sleepiness, with safety established only up to ~7 days. Because CBN is metabolized by liver CYP450 enzymes, it can theoretically interact with drugs sharing that pathway and may add to the sedation of alcohol, benzodiazepines, opioids, sedating antihistamines and other CNS depressants. CBN can trigger a positive THC urine screen. Avoid in pregnancy and breastfeeding (untested), and treat hemp-derived products cautiously as potency and purity are poorly regulated.

How many studies support CBN (Cannabinol)?

NutriDex cites 8 sources for CBN (Cannabinol), graded "Mixed".

Cite this page
APA

Peh, D. (2026). CBN (Cannabinol): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 26 Jun 2026, from https://nutridex.info/s/cbn

BibTeX
@misc{nutridex_cbn,
  author       = {Peh, Daryl},
  title        = {CBN (Cannabinol): Benefits, Dosage, Side Effects \& Evidence},
  year         = {2026},
  howpublished = {NutriDex --- The Supplement Research Compendium},
  url          = {https://nutridex.info/s/cbn},
  note         = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-06-26}
}

For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.

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