Cannabinoid Photostability

Cannabinoid photostability refers to the resistance of cannabinoids—particularly THC and CBD—to degradation when exposed to light. UV radiation and visible light can convert THC into CBN (cannabinol), a process that accelerates in the presence of heat and oxygen. Breeding programs focused on photostability aim to develop cultivars whose cannabinoid profiles remain chemically stable during storage and cultivation. This trait is relevant to both preservation practices and strain development, as lineage records show breeders working to isolate genetic factors that slow phytocannabinoid breakdown. Photostability is influenced by plant chemistry, terpene composition, and cellular antioxidant capacity rather than single genetic loci.

Breeders developing for photostability prioritize stable cannabinoid ratios in finished material, which improves shelf-life consistency and compliance with potency labeling. Selection often involves pairing this trait with oxidative-stress-resistant genetics and antioxidant-rich terpene profiles to reduce degradation in storage conditions.