Rogaine works in your scalp to enlarge your hair follicles and stimulate hair regrowth. Here are two examples of how Rogaine worked for most men with moderate degrees of hereditary hair loss (androgenetic alopecia) who used Rogaine for just 48 weeks in our clinical studies. Remember, individual results with Rogaine vary, although most men respond to its use. You may get better results if you have been losing hair for a shorter period of time or have little hair loss. Be sure to use Rogaine only as directed. Examples of Regrowth Using Men's Rogaine Extra Strength Note: Results not typical Why you need to stick with Rogaine to see results Why do you need to use Rogaine for two to four months before seeing results? It's like an exercise program. You don't run 10 miles your first day. It takes time to build muscle. It's the same with your hair. If your hair is thinning, it's because the hair follicles in your scalp have been shrinking for years. That's where Rogaine works — inside your scalp — to revitalize hair follicles and stimulate hair growth. That's also why you need to stick with it for at least four months. If you use Rogaine twice a day, every day, you should see results by then, or maybe sooner. Use the Rogaine Results program to help keep you on track.