Mice benefit from research into cannabis. Why not us? | Simon Jenkins

Instead of forging ahead with research on the benefits of cannabis, the UK criminalises millions

Reports in Tuesday’s Guardian were little short of sensational. Cannabis use dramatically improves memory capacity in older brains. German research suggests that small doses of tetrahydrocannabinol (THC) produced “profound, long-lasting improvement in cognitive performance”.

The results indicated that this could possibly stave off dementia for five to 10 years, the reverse of the impact cannabi...