I have read quite a few times individual people have said finasteride thickened their hair up but they did not actually grow new hairs. How can the hair thicken up without new hair growth. Does this mean the hair root expanded and got thicker making the hair on our head appear thicker or fatter?
Propecia (finasteride) generally thickens the miniaturized hairs, as well as grow new ones. For men that see thicker hair but no growth, there is probably some new growth that just isn’t being noticed.
Seeing results could also have to do with the age of the patient and the degree of hair loss they have. In general, the older you are, the less effective the drug will be. If you have early hair loss, the medication helps to reverse miniaturization (thus thickening the hair).