WHAT IS CBN
CBN (cannabinol) is the breakdown product of THC oxidation. Old cannabis — flower or concentrate aged at room temperature with air exposure for months — develops progressively higher CBN as the Δ9 THC oxidizes.
CBN is mildly psychoactive (about 10% of Δ9 THC’s CB1 affinity) and carries a strong anecdotal association with sedation and sleep support. This is why "old weed" has a reputation for putting you to sleep.
Research on CBN for sleep is preliminary but growing — several sleep-focused hemp brands market CBN-enriched gummies and tinctures. Some cultivators intentionally age specific cultivars to concentrate CBN for sleep-product production.
SLEEP RESEARCH
A 2023 Australian clinical trial (n=20) showed CBN at 30mg+ produced modest sleep-onset improvements compared to placebo, though the effect was smaller than expected.
Subjectively, CBN sleep products at 5–10mg often produce noticeable sedation. Combined with melatonin (1–3mg) and l-theanine (200mg), CBN-stack sleep gummies have become a popular OTC sleep category.
CBN is typically combined with low-dose Δ9 THC (2–5mg) for synergistic sleep effects. Pure CBN alone is meaningfully weaker than THC for sleep.
