I started using this product 3 wks ago. I'm in my 30's and when I look at old pictures and compare to now, I can see my hairline is much thinner. Especially after having 2 kids. I bought this through skinstore and figured I'd give it a try. You apply it 2 times a day with a dropper. It's actually fairly easy. After 2 weeks I saw the fine hair starting to come in.( I only used around the hairline, not throughout my head) Now at 3 wks it's visibly thicker and much closer to how my hairline was in my early 20's. The thinning receding hairline is gone. Only down side is once you stop, so does the new growth.