There was a research study that peppermint oil was as effective as minoxidil (rogaine) for hair regrowth and more effective at stimulating the growth phase. Hair follicles changes phase every three months from active to resting. You can make a spray with 10 drops of essential peppermint oil with a carrier oil such as almond, jojoba, coconut etc and massage it in, leave in overnight and wash out or add it to leave-in conditioner. I am going to start using this now, three months before surgery. It can't hurt at any rate.