CBN, or cannabinol, is a mildly psychoactive cannabinoid found in smaller concentrations in cannabis than its more famous cousins like THC and CBD. Unlike those cannabinoids, however, cannabinol does not directly derive from the precursor molecule, CBG. Rather, CBN is derived from the oxidation of THCA. As dried cannabis ages, THCA naturally converts into CBNA, the direct precursor of CBN. As such, the overall content of CBNA may broadly be used to ascertain the age of dried cannabis; the more it contains, the older it is.

CBN Medical Research

As is the case for other cannabinoids, medical research into the potential medical properties of cannabinol is currently ongoing. Below we present a small sample of peer-reviewed investigation.
ALS: Cannabinol delays symptom onset in SOD1 (G93A) transgenic mice without affecting survival
Analgesic: Δ9-Tetrahydrocannabinol and Cannabinol Activate Capsaicin-Sensitive Sensory Nerves via a CB1 and CB2 Cannabinoid Receptor-Independent Mechanism
Antibacterial: Antibacterial cannabinoids from Cannabis sativa: a structure-activity study
Appetite: Cannabinol and cannabidiol exert opposing effects on rat feeding patterns
Inflammation: Cannabinoids and the immune system:Potential for the treatment of inflammatory diseases?