I'm 39 and have developed some pretty deep "11s'" in between my eyes. They bother me so much b/c they make me look angry! I saw an Ad for Frownies in my newsfeed and thought I'd try them out. Wow! I've worn them pretty consistently for about 3 weeks and I feel like I have a new forehead! It's like my skin literally went back in time and my forehead looks 10-15 years younger. In the beginning, I noticed the lines reappearing fairly early on in the day, but now I'm seeing more permanent change. I'm also being more mindful of how often I used to furrow and raise my eyebrows. It definitely feels like I'm retraining my muscles. I LOVE that it's a *natural* way to take care of my skin. Thank you for this wonderful product!