Has anyone tried STC/SNC Superlife Stem Cell powder for stuttering ?

Has anyone tried STC/SNC Superlife Stem Cell powder for stuttering ? It's a stem cell therapy med used for many body illnesses etc. I doubt it's fully regulated but it has shown promising improvements. It directly works to repair and replace damaged cells including all the speech motor parts. So I'm wondering whether anyone has every tried this ? It's quite expensive as well. Like R1000+ per box of about 12-15 sachets for the month.