The legality of THC, a psychoactive compound in cannabis, varies across regions. Canada and Uruguay allow THC for recreational and medicinal use, while India's future depends on global cannabis legalisation and the growing medical marijuana movement. In India, THC is generally illegal, except in trace amounts in CBD products and bhang. In the US, THC's legality varies by state, with 23 states allowing recreational and medical use, 13 allowing medical use only, 10 allowing low-THC or CBD-only products, and three prohibiting THC products.