Latisse works on the vast majority of patients to various degrees. I have not seen it not work on anyone. The issue with Latisse is that you have to use it every day for the full 4 months to see the full effect. You’re only going to see a gradual effect each day, so if you’re thinking after a month you’re going to see a big difference, you will not. It does make longer, thicker, darker lashes, but it takes four months to put them in the growth phase. You have to give it time. It may not work on some people, but that is very rare. It is true that it doesn’t work to the same degree on all people. Some patients get very long lashes and end up cutting back on how they maintain it, while other patients really need to continue it daily. Just make sure you use it daily as directed with the applicator and you should see results after 4 months.