As far as the safety goes, we’re still a bit in the dark. Doctors we spoke to say that growth factors do work to turn on stem cells, especially those from a placenta, but they just don’t totally know how, which means that the side effects are also unknown. The FDA, which is tasked with regulation, says
that unproven stem cell therapy could damage healthy cell function and could lead to things like tumors. In 2014, a class-action lawsuit against Skinmedica
, a skin-care company owned by Allergan (a major pharma company also behind Botox, Juvederm, and Latisse ), claimed that its TNS Serum, which has human growth factors derived from human baby foreskin, posed a cancer risk that wasn’t disclosed to consumers for many years. The case was settled and the serum is still available today — for $320 for a little over one ounce
. And it’s not the only formula making headlines.