I hate to keep bothering you, but I’m full of questions! With fine hair, how much hair can be lost before it is considered noticeable? 25%? 50%? I am 4 months into using Propecia, and have new hair sprouting all over. I am surprised, as I have been losing hair for 20+ years. I am going to see where Propecia takes me, then finish it off with transplants.
In general, you need to lose about half (50%) of your original hair density (in even distribution) to notice social thinning but that also reflects your hair and skin color. In those with platinum blonde hair, you might be able to lose 80% before it is socially detectable. On the other hand, if you had black hair against white skin, a loss of 20% might be socially detectable. In other words, you need to lose between 20-80% of your original hair density to have others notice that you are thinning and this is based upon hair and skin color and the character of your hair. Of course, you (yourself) would notice that you are losing hair much sooner. This is generally if you lose hair evenly everywhere (and not in a pattern).
For those who respond well to Propecia, it takes about 8-12 months to see early differences… but it will not regrow all the hair you lost. Propecia mainly works to sustain what you ALREADY have and make those finer (miniaturized) hairs thicker and healthier. This will make it look like you have more hair as your hair diameters are thickening. You see, it’s not only about the numbers. Also be careful and note that Propecia should not be considered a cure to balding, but rather it slows that process down (dramatically) in some patients.