Title says it all and article gives details of 19 current medically unapproved therapies. None has any scientific evidence of positive results and some are outright dangerous
https://autismsciencefoundation.org/what-is-autism/beware-of-non-evidence-based-treatments/
One example:
Stem Cell Therapy: Stem cell therapy for autism is illegal in the United States, but that hasn’t stopped some from offering this as a treatment for autism in Costa Rica, China, and other countries. There is no evidence that the treatment is safe or effective for autism, and no guarantee that the stem cells used in these countries are even human.
https://autismsciencefoundation.org/what-is-autism/beware-of-non-evidence-based-treatments/
One example:
Stem Cell Therapy: Stem cell therapy for autism is illegal in the United States, but that hasn’t stopped some from offering this as a treatment for autism in Costa Rica, China, and other countries. There is no evidence that the treatment is safe or effective for autism, and no guarantee that the stem cells used in these countries are even human.