I had very, very scarce eyebrows due to over-waxing when I was younger. I lost hope in them. Finally, I tried this product and after 3 weeks, I've seen a huge difference. Hair is growing in places that they never have before. I know it's due to this product, because I've been trying to grow my brows out since I was 20 years old and I have not had any success until now. My eyebrows are still thin, but they are filling in gradually. It will take some time and some dedication to using this product every day. You should really give this a try if you are embarrassed or bothered by your thin brows!