From everything I've read online, plant stem cells appear to be a gimmick, ineffective. But the well-recommended and well-established MedSpa I'm going to for micro needling uses a serum with plant stem cells only, claiming that people have had good results. Seriously? Is there any reason to think they might actually work? I'm thinking of bringing them a human growth factor serum to put on my face instead, if they are willing to.