Unpublished research may show that S. canadensis (American elderberry) has lower cyanide levels than apple juice, and that its fruit does not contain enough beta-glucosidase (which convert glucosides into cyanide) to create cyanide within that biochemical pathway.
Research that has not been released may indicate that the American elderberry (S. canadensis) has reduced cyanide content compared to apple juice, and its fruit does not possess enough enzyme activity to produce cyanide through a specific biochemical process.