Understanding THC, THCa and CBD Published: 26 July 2022Last Updated: 22 July 2026Last Reviewed: 22 July 2026Author: Weed Supermarket Editorial Team What’s the Difference? Cannabinoids are naturally occurring compounds found within the Cannabis sativa plant. Among the best known are THC (tetrahydrocannabinol), THCa (tetrahydrocannabinolic acid) and CBD (cannabidiol). Although these cannabinoids share a common origin,...