An aggressive cannabis lobby is fuelling a dangerous complacency about the risks the drug poses to teenagers’ mental health, Britain’s top psychiatrist said. Dr Lade Smith, president of the Royal College of Psychiatrists, said young people were damaging their brains by smoking high-strength cannabis and risking psychotic episodes that could ruin their lives. “When you start smoking with your mates at 14 or 15, you are literally growing your brain in a cannabis soup,” she said. “There’s no doubt