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Can Weed Lose Potency Over Time?

Can weed lose potency over time — THC to CBN conversion diagram with Keefer Onyx stash jar

Updated July 2026 | 10 min read Yes — weed loses potency over time, and the science behind exactly how much and how fast is more precise than most people realize. The compound responsible for cannabis’s psychoactive effects, THC (delta-9-tetrahydrocannabinol), is chemically unstable. From the moment flower is harvested, THC begins a slow conversion into […]