Problems making "liquid nutrition" have led to a national emergency, the NHS says.
Private cannabis clinics have now opened in the UK, charging up to £800 per month for prescriptions.
Jason Anderson had high blood pressure and was offered a gastric band but refused.
A government adviser blames cuts to treatment programmes as the death toll hit 2,917 in 2018.
They say tackling tooth decay - which affects a quarter of five-year-olds - is a priority.