I have researched causes of ALS for the past six years and formed a non-profit Trust around the findings. I have never seen an instance where stem cells benefit ALS patients. We have found ALS is liver disease. It is the inability to absorb nutrients from foods and also fluids [causing the muscle wasting] in the inability to eliminate waste [toxins impact the brain]---ie liver function.
Very simply, if you administer virgin cells in a toxic environment, history will repeat itself. However, I believe there may be promise for stem cells with injuries.