In short
Autologous stem cells are collected from the recipient's own body, then prepared or expanded before being returned. The advantage is lower immune rejection risk; the limitation is that cell quality depends on the donor's own age and health.
Autologous versus allogeneic
Allogeneic cells come from another donor, can be produced in large standardised batches and offer more consistent quality, but immune response must be considered. Autologous cells reduce that issue but require individual preparation time.
What to verify
Recipients should know where and how cells are collected, cultured and tested, whether contamination and endotoxin testing is performed, what cell count and viability are reported, and whether the activity is within that country's legal framework.