I have only been using the Follicle Serum for a short time, but I do not like what it does to the surrounding hair; frizz, frizz, frizz. I have curly and also frizzy hair to begin with, and on top of that I live in Florida and we have such high humidity that no one here has a good hair day until late November. Also, it interacts with the very light and soft hold hair spray I use and makes it sticky and somewhat brittle. I have used a product called Frizz-Ease for 20 years to keep the frizz at bay, but it doesn't work while using this product. Definitely will not purchase again.
Bottom Line: No, I would not recommend this to a friend