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In my case the combo finasteride / minoxidil helped everywhere on the head (in terms of regrowth, hair count maintenance, hair thickness and quality), even in the donor zone (back and sides hair thickened with propecia).

My hair litterally turned stronger and "darker" in color since I use finasteride, and my eyelashes doubled in thickness since I started minoxidil ( an "undesirable systemic effect", but a proof that minoxidil is a crazy over-the-counter substance that works ).

But the front and temples will always be more difficult to treat... the hair loss in this area is usually more stubborn / aggressive.