4,trx rip trainer.44 (25 votes) Article opinions: 1 posts The evidence is now compelling enough to warn young people of a 40+% higher risk of developing a psychotic illness later in life if they use cannabis, according to an article published in The Lancet this week. The Lancet also has an accompanying Comment and Editorial on the same subject. The Editorial concludes that "Governments would do well to invest in sustained and effective education campaigns on the risks to health of taking cannabis." Approximately 20% of young people in the UK say they consume cannabis (marijuana) at least once a week. Cannabis is the most common illegal substance in the United Kingdom and the United States. Dr Theresa Moore, University of Bristol, and Dr Stanley Zammit, Cardiff University, ...