some people say it has.. i have been using it for a year and i have noticed it thickened my hair quite a bit. especially in the crown area.... as far for the front i did not notice too much of a difference. i would suggest stacking t with propecia it can work better... also try using nizoral 2% shampoo (get a prescription form a dermatologist... they also have it in non prescription strength.....what i would do is start to use rogaine 5%, twice a day, for a year. see how u like it,,,,i'm sure u will be happy with your results, try to use propecia as well. and like i said shampoo with nizoral 2% every other day...and if u have to dye yyour hair this will make an apparent difference...but dont spend money on transplants quite yet.. at least do some in-depth research first.....