What about stem cell products?
So far I think they are a triumph of marketing over real data and results. That could change though so they are an interesting area to watch.
Many people confuse "stem cell" products with products that contain growth factors from very young fibroblasts (cells that produce collagen and other things) that are grown in a lab. Examples of these are the TNS products and some of the Neocutis products that contain "PSP" which is Neocutis’s name for the supernatant from the cells that is then refined in various ways. More info on products here. Dr. I