minoxidil does not stop working after several years. male pattern baldness progresses by the genetic clock over the years to the point that not even mixoxidil can stop it. anyone avoiding minoxidil because they are worried about getting dependent on it really need to read my posts and educate themselves. If anything, I think that letting hair thin causes it to become sensitive to DHT and other processes sooner than it would if it were protected the whole time. When people come off finasteride after 28 days, their DHT levels do NOT even for a day climb higher than baseline. They return to normal. In the 5 year propecia trial, when part of the propecia group was switched to placebo, they lost hair faster than the placebo in any other part of the study, but they did not fall down below the placebo group or even reach the placebo group. I think that had they not been switched back to propecia, they would have reached the placebo group or stayed just slightly above them for a year or so. Notice that when they were put back on propecia, they climbed back up and reached almost exactly the same level (minus maybe 5 hairs) as the group that was always on propecia. This means that in a year, the protected follicles continued to become more sensitive with their counterparts in non-protected people, and the rate at which hair was lost is proportional to the difference in sensitivity and actually DHT levels. The 5 hairs lost are the amount that are perhaps permenantly lost, though from the slope of the graph it looks like they will intersect. Most importantly, notice that the group that started early and missed a year had significantly more hair in the end than the group that started a year late and then stayed on propecia the remaining 4 years.
http://a248.e.akamai.net/7/248/430/2006 ... _chart.gif
http://a248.e.akamai.net/7/248/430/2006 ... _chart.gif