Original sentence: As well as the common alternative medicine practice of internal use of chelating agents the group promotes a skin cream that J.Handley calls the a magic cream.No substantive studies have ascertained the efficacy of chelation as a treatment for autism.There is no evidence that chelating agents can be absorbed through the skin
Edited sentence: Although no substantive studies have ascertained the efficacy of chelation as a treatment for autism, for decades it has been used by medical practitioners to detoxify people suffering from severe cases of heavy metal exposure.Rescue Angels are organized by state and/or country and can be accessed via the Generation Rescue website, where Rescue Angels can be contacted directly.Rescue Angels are parents autism spectrum children willing to help other parents in treating their children, sharing expertise, local knowledge, and experience