Mesenchymal stem cells secretome (MSC-S) are non-hematopoietic multipotent stromal cells that have the ability to renew themselves and differentiate into multilineages, which has been shown to have therapeutic effects on wound healing process. In order to produce a “ready-off-the-shelf ” secretome powder, a lyophilization or also known as freeze-drying process needs to be carried out. I…