This product is a miracle. My hair started thinning a couple years ago. After using an expensive French oil that I applied directly to my scalp every week for over a year, I didn't notice much change. Yet, this wonder Shiitake product gave me incredible results within one month! I take a dropper every night before going to bed and after three-four weeks, my hair started growing back and getting thicker again. I never miss a night. Another product that's worth EVERY penny!