In the UK, 40 per cent of teenagers have experimented with drugs by the age of 16.
This video follows the rehabilitation of former addicts that have progressed to using heroin and crack cocaine. Many have turned to a life of crime in order to fund their habit and need help in coming off drugs.
Teen Challenge London is a rehabilitation unit founded in 1958 that is dedicated to helping and supporting people when withdrawing from drugs. It is a spiritual based programme and is one of the most successful in the whole world.
The people featured in this video are living proof that no matter how bleak a persons situation is, even if they have lost everything, there is still hope that recovery is possible.