29 – Stem cells can grow hair?
Stem cell is a multipotent cell which can differentiate into any cell in the body. Once injected in the body, how will it know if it has to form a nerve or tendon or cartilage or lung or liver? Wherever any natural repair or restoration is in progress, the tissue secretes a signaling wnt protein, which indicates the stem cell to create new cells and help in the repair. Hair has no natural repair and no identifiable wnt protein. Hence the stem cells injected around the hair follicle, may or may not induce some villus new hair and then may go and repair a smoker’s lung rather than grow hair. Stem cells have not succeeded in achieving any hair growth and are not FDA approved for clinical use.