I hate to be the bearer of bad news, but there isn’t a cure
If there was women like Elaine Page and Gloria Hunniford would be using the product. They both had wonderful heads of hair, have you seen them lately? Their hair is a shadow of what it used to be.
Mine was put down to my pernicious anemia, it wasn’t that. Then it was my thyroid. That was doubled, it wasn’t that.
My hair is passable when at home but when I go to a restaurant or show/wedding/party I wear a very good wig that I bought last year.
If it’s just your crown that’s thinning I would look at buying a Topper there are hundreds online. Buy a cheap one to play about with and if you like it go to a good wig shop like I did.