By Richard Hooper Face the Facts, BBC Radio 4
Children with autism are "falling prey to untested approaches" to the disorder, a leading charity has said.
The National Autistic Society said therapies with no supporting evidence were being sold to parents.
The warning comes after a BBC investigation found the use of dietary supplements and biomedical therapies being widely touted as a treatment.
There is no cure for autism and current best practice involves the use of behavioural and educational therapies.
BBC Radio 4's Face the Facts programme found that treatments, for which medicines regulator NICE says there is no clinical evidence, are readily available in the UK including: